Atmos
CombinAir
Settings and Maintenance of the CombinAir
Issue 13.8.10
Operation and commissioning:
The control unit on the front of the CombinAir is used to adjust the settings during commissioning.
The settings for the heat pump which need to be checked or adjusted during commissioning are shown
in colour. This document gives guidance on how to access and change the settings.
Control unit
Nr.
Description
Type
1
Set button
button
2
Reset button
button
3
hot water button
button
4
hot water LED
LED
5
Status display
1 x 7 – segments
display
6
CH water display
2 x 7 – segments
display
USER PROGRAM
The user program is identified by a permanently lit letter followed by a dot.
Access
Next setting
Different value
Exit program
•
•
•
•
Status
display
C.
F.
G.
H.
J.
L.
S.
CH
water
display
88
0.0
8.8
88
88
88
88
88
00
:
:
:
:
Press the ‘Set’ button for 5 seconds until the letter C. appears
Press the ‘Set’ button
Press the ‘Hot Water’ button
Press the ‘Reset’ button
Function
CH flow temperature
CH pressure sensor is de-activated
CH water pressure
Last malfunction (gas boiler)
Last blocking (gas boiler)
Last malfunction (heat pump)
Last blocking (heat pump)
Last warning (heat pump)
Non standard setting
Setting
°C
Bar
INSTALLER PROGRAM
The installer program is identified by permanently illuminated letter without a dot.
•
•
•
•
•
Access
Next setting
Different value
Exit program
To enter sub-menu
Status
display
A
CH water
display
??
LL / ??
HH / ??
b
c
Sb
01
:
:
:
:
:
Press the ‘Set’ button for 10 seconds until the letter A appears
Press the ‘Set’ button
Press the ‘Hot Water’ button
Press the ‘Reset’ button
Press the ‘Hot Water’ button
Description
Ionisation flow (virtual) when appliance is
operating
Low capacity (continuous), alternating with the
virtual ionisation flow
High capacity (continuous), alternating with
the virtual ionisation flow
Submenu sensor values
One temperature zone with WDC without
RT
Remarks
Adjusting O2% / CO2%
Sub-menu sensor values
02
One temperature zone WDC with RT
03
Two temperature zones, linked control:
04
Two temperature zones, linked control:
05
Two temperature zones:
Heat pump WDC without
RT, gas boiler WDC
without RT
06
Two temperature zones:
Heat pump WDC without
RT, gas boiler WDC with
RT
Heat pump WDC without
RT, Gas boiler WDC
without RT
Heat pump WDC with RT,
Gas boiler WDC with RT
07
Two temperature zones:
Heat pump WDC without
RT, gas boiler no WDC
08
Two temperature zones:
Heat pump WDC with RT,
gas boiler WDC without
RT
09
Two temperature zones:
Heat pump WDC with RT,
gas boiler WDC with RT
10
Two temperature zones:
Heat pump WDC with RT,
gas boiler no WDC
d
Sb
Submenu CH- settings heat pump (LT zone)
See settings heat pump
E
Sb
Submenu CH- settings gas boiler (HT zone)
See settings gas boiler
F
?1 / ?2
Last malfunction (lock-out)
G
?1 / ?2
Last blocking
?1 = fault serial number
?2 = fault code
?1 = serial number of
blocking
?2 = blocking code
H
0.0
0.1
0.2
0.3
0.4
1.0
24
00
03
06
Hot water pump overrun time 1 [min]
Hot water pump overrun time 10 [min]
Hot water pump overrun time 20 [min]
Hot water pump overrun time 30 [min]
Hot water pump overrun time 40 [min]
Hot water pump overrun time 60 [min]
Hot water pump overrun time continuous
heating delay off
heating delay 3 [min]
heating delay 6 [min]
05
10
15
20
00
11
22
??
Sb
Frost protection gas boiler 5ºC
Frost protection gas boiler 10ºC
Frost protection gas boiler 15ºC
Frost protection gas boiler 20ºC
Non standard settings
Standard settings NL/B
Standard settings D
Appliance recognition
Submenu settings heat pump
P
q
S
t
u
delay in responding to a
call for space heating
after the last firing for
space heating
See blocking messages
See settings heat pump
Submenu sensor values
To access the submenu sensor values go to setting b in the service settings menu (installer program) and
press the hot water button. On the status display the sensor value b / A is alternately displayed. Pressing the
set button will display the next sensor value. Exit the menu by pressing the reset button.
Status
display
b/A
CH water display
Description
Remarks
Value
DHW temperature
ºC
b/c
Value
CH flow temperature
ºC
b/C
Value
CH pressure
bar.
b/d
Value
CH return temperature
ºC
b/E
Value
Gas boiler fan speed
Rpm (x100)
b/F
Value
Heat pump fan speed
Rpm (x100)
b/G
Value
Heat pump air inlet temperature
ºC
b/H
Value
Heat pump evaporator temperature
ºC
b/I
Value
Heat pump condenser outlet temperature
ºC
b/J
Value
Heat pump compressed gas temperature
ºC
b/L
Value
Heat pump flow temperature
ºC
b/n
Value
Frequency flow-sensor
b/P
Value
Heat pump blend temperature
Number
ºC
b/q
Value
Heat pump system temperature
ºC
b/r
Value
Selection resistance 2
b/t
Value
Selection resistance 1
b/u
Value
Outside temperature
Number
Number
ºC
Submenu CH settings heat pump
To access to the submenu CH settings heat pump go to setting d in the service settings menu (installer
program) and press the hot water button. On the status display the first setting d / h is alternately displayed.
By pressing the set button the next setting is displayed. Change the setting by pressing the hot water button.
Pressing the reset button twice will exit the menu and save the settings.
Status
display
d/h
d/H
d/o
d/O
d/P
d/q
d/S
d/t
d/u
d/U
CV water
display
01
03
05
10
20
30
40
50
60
12
…
20
…
24
15
…
30
…
25
…
50
-5
…
2
…
10
12
15
18
21
24
4
6
8
10
1
2
4
6
-15
…
-10
…
0
25
…
40
…
80
Description
Overrun time CH pump heat pump 1 minute
Overrun time CH pump heat pump 3 minutes
Overrun time CH pump heat pump 5 minutes
WDC pump switching interval period 10 minutes
WDC pump switching interval period 20 minutes
WDC pump switching interval period 30 minutes
WDC pump switching interval period 40 minutes
WDC pump switching interval period 50 minutes
WDC pump switching interval period 60 minutes
WDC base point at outside temperature 12 ºC
WDC base point at outside temperature …. ºC
WDC base point at outside temperature 20 ºC WDC base
point at outside temperature …. ºC
WDC base point at outside temperature 24 ºC
WDC flow temperature 15 ºC at base point d / o
WDC flow temperature .... ºC at base point d / o
WDC flow temperature 30 ºC at base point d / o
WDC flow temperature .... ºC at base point d / o
WDC flow temperature 25 ºC at base point d / o
WDC flow temperature .... ºC at base point d / o
WDC flow temperature 50 ºC at base point d / o
WDC base point night reduction at base point - 5 ºC
WDC base point night reduction at base point - … ºC
WDC base point night reduction at base point
2 ºC
WDC base point night reduction at base point - … ºC
WDC base point night reduction at base point 10 ºC
WDC recalculation time RT 12 minutes
WDC recalculation time RT 15 minutes
WDC recalculation time RT 18 minutes
WDC recalculation time RT 21 minutes
WDC recalculation time RT 14 minutes
WDC switching difference 4 ºC
WDC switching difference 6 ºC
WDC switching difference 8 ºC
WDC switching difference 10 ºC
Waiting time for switching on the gas boiler 30 minutes
Waiting time for switching on the gas boiler 60 minutes
Waiting time for switching on the gas boiler 120 minutes
Waiting time for switching on the gas boiler 180 minutes
WDC climate point at outside temperature – 15 ºC
WDC climate point at outside temperature – … ºC
WDC climate point at outside temperature – 10 ºC
WDC climate point at outside temperature – … ºC
WDC climate point at outside temperature
0 ºC
WDC flow temperature 25 ºC at climate point d / u
WDC flow temperature … ºC at climate point d / u
WDC flow temperature 40 ºC at climate point d / u
WDC flow temperature … ºC at climate point d / u
WDC flow temperature 80 ºC at climate point d / u
Remarks
Adjustable in
increments
of 1 ºC
Adjustable in
increments
of 1 ºC
Adjustable in
increments
of 1 ºC
Adjustable in
increments
of 1 ºC
Adjustable in
increments
of 1 ºC
Adjustable in
increments
of 5 ºC
Submenu CH settings gas boiler
To access the submenu CH settings gas boiler go to setting E in the service settings menu (installer
program) and press the hot water button. On the status display the first setting E / h is alternately displayed.
By pressing the set button the next setting is displayed. Change the setting by using the hot water button.
Exit the menu by pressing the reset button three times.
Status
Display
E/h
E/h
E/H
E/L
E/n
E/o
E/O
E/P
E/q
E/S
CH water
display
40
…
80
…
90
01
03
05
10
20
30
40
50
60
00
05
10
15
00
02
05
10
12
…
20
…
24
15
…
30
…
25
…
50
-5
…
2
…
10
12
15
18
21
24
4
6
8
10
Description
CH flow maximum temperature 40 ºC
Adjustable in increments of 1 ºC
CH flow maximum temperature 80 ºC
Adjustable in increments of 1 ºC
CH flow maximum temperature 90 ºC
Overrun time CH pump heat pump 1 minutes
Overrun time CH pump heat pump 3 minutes
Overrun time CH pump heat pump 5 minutes
WDC pump switching interval period 10 minutes
WDC pump switching interval period 20 minutes
WDC pump switching interval period 30 min
WDC pump switching interval period 40 minutes
WDC pump switching interval period 50 minutes
WDC pump switching interval period 60 minutes
Low capacity burner time off
Low capacity burner time 5 minutes
Low capacity burner time 10 minutes
Low capacity burner time 15 minutes
Accelerated heating off
Accelerated heating 2 minutes
Accelerated heating 5 minutes
Accelerated heating 10 minutes
WDC base point at outside temperature 12 ºC
WDC base point at outside temperature …. ºC
WDC base point at outside temperature 20 ºC
WDC base point at outside temperature …. ºC
WDC base point at outside temperature 24 ºC
WDC flow temp. 15 ºC at base point E(d) / o
WDC flow temp. .... ºC at base point E (d) / o
WDC flow temp. 30 ºC at base point E (d) / o
WDC flow temp. .... ºC at base point E(d) / o
WDC flow temp. 25 ºC at base point E(d) / o
WDC flow temp. .... ºC at base point E(d) / o
WDC flow temp. 50 ºC at base point E(d) / o
WDC night reduction at base point - 5 ºC
WDC night reduction at base point - … ºC
WDC night reduction at base point
2 ºC
WDC night reduction at base point - … ºC
WDC night reduction at base point 10 ºC
WDC recalculation time RT 12 minutes
WDC recalculation time RT 15 minutes
WDC recalculation time RT 18 minutes
WDC recalculation time RT 21 minutes
WDC recalculation time RT 24 minutes
WDC switching difference 4 ºC
WDC switching difference 6 ºC
WDC switching difference 8 ºC
WDC switching difference 10 ºC
Remarks
Only available
when
installation
type = 10
Adjustable in
increments of
1 ºC
Adjustable in
increments of
1 ºC
Adjustable in
increments of
1 ºC
E/u
E/U
E/Y
-15
…
-10
…
0
25
…
40
…
80
WDC climate point at outside temperature – 15 ºC
WDC climate point at outside temperature – … ºC
WDC climate point at outside temperature – 10 ºC
WDC climate point at outside temperature – … ºC
WDC climate point at outside temperature
0 ºC
WDC flow temp. 25 ºC at climate point E(d) / u
WDC flow temp … ºC at climate point E(d) / u
WDC flow temp. 40 ºC at climate point E(d) / u
WDC flow temp. … ºC at climate point E(d) / u
WDC flow temp. 80 ºC at climate point E(d) / u
07
15
24
Capacity limitation gas boiler 7 kW
Capacity limitation gas boiler 15 kW
Capacity limitation gas boiler 24 kW
Adjustable in
increments of
1 ºC
Adjustable in
increments of
1 ºC
Adjustable in
increments of
5 ºC
Submenu settings heat pump
To access the submenu settings heat pump go to setting u in the service settings menu and press the hot
water button. On the status display the first setting u / C is alternately displayed. Pressing the set button will
bring up the next setting. Change this setting by pressing the hot water button. Pressing the reset button
twice will exit the menu and save the changed settings.
Status
display
u/C
u/F
u/P
CV water
Display
666
AA
1
…
12
…
15
1
…
15
Description
Remarks
Blending valve heat pump
Don’t adjust!
Fan speed heat pump
Fan speed heat pump
Fan speed heat pump
Fan speed heat pump
Fan speed heat pump
CH pump setting (heat pump)
CH pump setting (heat pump)
CH pump setting (heat pump)
Adjustable in increments
of 1 between 1 and 15
Adjustable in increments
of1 between 1 and 15
WARNING, BLOCKING AND MALFUNCTION MESSAGES
The Atmos CombinAir has three types of error messages:
1. Warning messages
In this case, instead of the status message, a letter appears on the status display for one second, once every
5 seconds.
2. Blocking messages
A permanently illuminated letter appears on the status display.
3. Malfunction messages
A flashing letter or number appears on the status display.
In the event of a warning message, the function to which the message applies will be switched off while the
appliance continues to operate. In the event of a malfunction message, the entire appliance will be shut
down requiring manually resetting before the boiler will continue operation.
OPERATING CODES ON THE ATMOS COMBINAIR
Status display code
1
2
No dot
Slow flashing dot
Increasingly fast flashing dot
Constant dot
Function
Hot water heating
operating
Central heating operating
No burner
Minimum fire
Higher & higher firing
Burner on maximum
output
SUMMARY OF MESSAGES
This section provides a brief description of the warning, blocking and malfunction messages which appear on
the unit’s status display. The causes of these messages are addressed in more detail in section 5.
Warning messages
A warning is identified by a letter that appears on the status display every 5 seconds for a period of 1
second, instead of the status message.
Warning message in status display
every 5 seconds
b
c
d
h
Diagnosis
Incorrect DHW reading; value <-10 or > 118°C
Incorrect CH water pressure; value between 0 and 0,5 bar or 3
and 9 bar (capacity is limited to low setting
Incorrect CH return sensor reading; value <-10 or > 118°C
Incorrect outside sensor reading (WDC); <-10 or > 118°C
Blocking messages
A blocking is an error that occurs without causing a malfunction. The unit waits until the blocking has been
resolved and then continues to operate normally. A blocking is indicated by a permanently lit letter on the
status display. The sensor value for the sensor that the blocking message refers to, can be displayed in the
CH water display by accessing the submenu sensor values in the installer program.
Status display
code
c
CH water
display
HH
LL
C
F
H
L
n
t
HH
LL
10
11
20
21
22
30
40
50
60
Diagnosis
CH flow temperature sensor error; > 118°C
CH flow temperature sensor error; < -10°C
CH water pressure lower than 1 bar
Mains frequency error
Internal error (control unit)
Electrical mains plug error – correct supply polarity
Mains or reference voltage too low
Appliance type recognition error; value > 118°C
Appliance type recognition error; value < -10°C
Appliance type recognition error; control unit is set to 24/80
Appliance type recognition error; control unit is set to 24/80+
Appliance type recognition error; control unit is set to 32/80
Appliance type recognition error; control unit is set to 32/80+
Appliance type recognition error; control unit is set to 30/50+
Appliance type recognition error; control unit is set to 38/80+
Appliance type recognition error; control unit is set to Combipact
Appliance type recognition error; control unit is set to CombinAir
Appliance type recognition error; control unit is set to CombinAirCool
Malfunction messages
A malfunction is an error which is so serious that the unit is locked. A malfunction message is identified by a
locked control unit accompanied by a flashing number or letter on the status display. The appliance can only
be unlocked by pressing the reset button.
Status display code
1
2
3
3.
4
4.
6
7
7.
8
9
9.
Letter
(Dark display)
CH water
display
Diagnosis
Blocking for longer than one hour
Fan defective (5 Hz deviation per minute)
Incorrect ionisation (flame) signal
No ionisation (flame) signal during start-up procedure
Ionisation signal absent during heat supply
Ionisation signal remains present after heat supply
Gas valve control defective
Insufficient flow of CH water during DHW demand
Insufficient flow of CH water during CH demand
Maximum thermostat cuts out and CH water pressure was < 0,5 bar
Maximum thermostat cuts out and CH flow sensor was > 80°C
Safety internal malfunction in control unit
Internal malfunction in control unit
Appliance receiving no mains power
CAUSES OF MESSAGES
Warning messages
A warning is identified by a letter that appears on the status display every 5 seconds for a period of 1
second, instead of the status message. The appliance continues to operate, but the function to which the
message applies will be switched off or ignored. Once the cause of the warning message has been solved,
the appliance will start up again automatically so resetting is not necessary. The possible causes are
described below in order of probability. Also look for the malfunction in this order.
The sensor value for the sensor that the warning message refers to, can be displayed in the CH water
display by accessing the submenu sensor values in the installer program.
Message
in status
display
every 5
seconds
b
Diagnosis
DHW temperature < -10 or > 118
°C. In sub-menu sensor values the
message HH (> 118°C) or LL (< 10°C) appears on the CH water
display
CH
water
display
HH
LL
c
CH water pressure too low or too
high. Whilst this is the case the
output will be limited to the lowest
capacity. If the current CH water
pressure is not shown on the CH
water display the current CH water
pressure can be read through the
sub-menu sensor values.
d
CH return temperature < -10°C or >
118°C. In the sub-menu sensor
values HH (> 118°C) or LL (< 10°C) will appear on the CH water
display
h
Outside temperature < -10°C or >
118°C. In the sub-menu ‘sensor
values’ HH (> 118°C) or LL (< 10°C) will appear on the CH water
display (only WDC)
0 – 0,5
Bar
Cause
• CH temperature > 118°C
• Connector K4 loose or improperly
connected
• Temperature sensor wiring interrupted. For
the sensor wiring connection to connector
K4 see the diagram in the appendix.
• Sensor defective
• Control unit defective
• CH temperature < -10°C
• Short circuit in temperature wiring
• Sensor defective
• Control unit defective
• CH system lacking water pressure
• Leak in the appliance or CH system
• CH pressure sensor defective confirmed by
pressure reading remaining unchanged
when filling the system
• wiring from pressure sensor to connector
K2 defective or bad connection
3–9
Bar
• CH system water over pressurised (but
PRV should discharge when pressure > 3
bar)
• Wiring from pressure sensor to connector
K2 defective or bad connection
• CH pressure sensor defective confirmed by
pressure reading remaining unchanged
when water is discharged
HH
• See cause of HH for warning code b.
LL
HH
• See cause of LL for warning code b
• See cause of HH for warning code b
LL
• See cause of LL for warning code b
Blocking messages
A blocking message is identified by a permanently illuminated letter on the status display. Once the blocking
has been solved, the appliance will start up again automatically. So resetting is not necessary. The possible
causes are described below in order of probability. Also look for the malfunction in this order.
Status
display
c
CH water
display
HH
LL
Diagnoses
Cause
CH flow temperature > 118°C.
(access through submenu sensor values in
the installer program)
• Connector K4 loose or improperly
connected
• Temperature sensor wiring
interrupted. For the sensor wiring
connection to connector K4 see the
diagram in the appendix.
• Sensor defective
• Control unit defective
• Short circuit in temperature wiring
• Sensor defective
• Control unit defective
• CH pressure lower than 1 bar
F
CH flow temperature < -10°C
(access through submenu sensor values in
the installer program)
Appliance blocked because CH system
pressure is too low
Mains frequency error
H
Internal error (control unit)
L
Electrical mains supply
n
Mains or reference voltage too low
C
HH
Appliance type recognition error; value >
118°C
LL
Appliance type recognition error; value < 10°C
Appliance type recognition error; control unit
is set to 24/80
Appliance type recognition error; control unit
is set to 24/80+
Appliance type recognition error; control unit
is set to 32/80
Appliance type recognition error; control unit
is set to 32/80+
Appliance type recognition error; control unit
is set to 30/50+
Appliance type recognition error; control unit
is set to 38/80+
Appliance type recognition error; control unit
is set to 24/33
Appliance type recognition error; control unit
is set to CombinAir
Appliance type recognition error; control unit
is set to CombinAirCool
10
11
20
t
21
22
30
40
50
60
• If this blocking occurs frequently or
for a long period, replace control unit
• If this blocking occurs frequently or
for a long period, replace control unit
• Mains supply has wrong polarity
• Not earthed
• Ionisation electrode earth wire loose
• Control unit defective
• Mains voltage < 200 Volts
• Mains voltage insufficient
• Control unit defective
• Control unit selected incorrectly
• Selection resistance defective
• Control unit defective
Blocking messages heat pump
Status
message
CH water
display
CE 25
CE 26
CE 27
CE 28
CE 37
CE 38
CE 40
CE 41
CE 42
CE 43
CE 44
CE 45
CE 46
CE 48
CE 49
CE 50
CE 51
CE 52
CC 01
CC 02
CC 03
CC 04
Cause
Internal error control unit
Internal error control unit
Internal error control unit
Internal error control unit
Condenser temperature sensor error (<-30 [° C], open circuit)
Compressed gas sensor error (<-30 [° C], open circuit)
Heat flow temperature sensor error (<-30 [° C], open circuit)
Evaporator temperature sensor error (<-30 [° C], open circuit)
Air flow temperature sensor error (<-30 [° C], open circuit)
Heat mixing temperature sensor error (<-30 [° C], open circuit)
System temperature sensor error (<-30 [° C], open circuit)
Condenser temperature sensor error (> 90 [° C], shorted)
Compressed gas sensor error (> 90 [° C], shorted)
Heat flow temperature sensor error (> 90 [° C], shorted)
Evaporator temperature sensor error (> 90 [° C], shorted)
Air flow temperature sensor error (> 90 [° C], shorted)
Heat mixing temperature sensor error (> 90 [° C], shorted)
System temperature sensor error (> 90 [° C], shorted)
This error code can only occur if the CombinAir is connected to a two-zone
system. The boiler cannot support the heat pump with the result that the
dwelling is not or insufficiently heated. This may be caused by air in the
system or it can be caused by a software error in the control unit of the heat
pump.
Communication problem between the heat pump and gas boiler. Without
communications there will be no heat delivered because the position of the
mixing valve is unclear. Check the connection of the data cable.
Mix temperature imbalance. This will probably be caused by air in the system.
This code means that there is heat demand, but the CombinAir cannot transfer
the heat to the installation. This is due to the fact that (part) of the installation is
equipped with thermostatic radiator valves that are closed and that no bypass
is installed, or is not open.
Malfunction messages
A malfunction message is indicated by a flashing number or letter on the status display combined with a
locked control unit. Once the malfunction is solved, the control unit must be unlocked by pressing the reset
button once. Should the control unit fail to unlock, try again after approximately 20 seconds. Also look for the
malfunction in this order.
Code
Diagnosis
Status
display
1
Blocking occurred for longer than one hour
2
Fan defective (5 Hz deviation per minute)
3
Incorrect ionisation (flame) signal
3.
No ionisation (flame) signal during start-up
procedure
Cause
• See last
blocking gas boiler (through user
program)
• Fan not turning
• Fan’s electrical connection loose or improperly
connected
• Control unit defective
• Gas valve remains open
• Control unit defective
• No gas supply
• Gas tap closed
• Gas valve defective
• Gas valve’s electrical connection loose or
4
Ionisation signal absent during heat supply
4.
Ionisation signal remains present after heat
supply
Gas valve control defective
6
7
Insufficient flow of CH water during DHW
demand
7.
Insufficient flow of CH water during CH
demand
8
Maximum thermostat cuts out and CH water
pressure was < 0,5 bar
9
Maximum thermostat cuts out and CH flow
sensor was > 80°C
improperly connected
• Air supply obstructed
• Flue tube obstructed
• Siphon obstructed
• Ionisation cable not in order
• Ionisation probe defective or causing short-circuit
such as against the burner or heat exchanger
• Ignition transformer defective
• Ignition transformer electrical connection loose or
improperly connected
• Ignition cable defective
• Ignition electrode defective or causing short-circuit
• Control unit defective
• Insufficient gas supply
• Syphon obstructed
• Ionisation probe defective or causing short-circuit
such as against the burner or heat exchanger
• Gas valve setting incorrect
• O2/ CO2 content more than 7,5% at low setting
• Fan’s low capacity circuit defective or interrupted
• Burner damaged
• Control unit defective
• Gas valve defective, remains open
• Control unit defective
• Wiring error
• Control unit defective
• Insufficient CH water pressure too low (minimum 1
bar at the appliance)
• Automatic de-aerator not functioning properly (air
in the appliance)
• CH pump not running
• Connector K5 loose
• CH pump defective
• Thermal safety switched off
• Control unit defective
• Insufficient CH water pressure too low (minimum 1
bar at the appliance)
• Automatic de-aerator not functioning properly (air
in the appliance)
• CH pump not running
• Connector K5 loose
• CH pump defective
• Thermal safety switched off
• Control unit defective
• All (thermostatic) radiator taps are closed
(pressure difference regulator not set properly if
present)
• CH water pressure incorrect (< 0,5 Bar)
• CH flow sensor not properly connected
• Thermal safety connection defective
• Thermal safety defective
• CH pump not running
• Connector K5 loose
• CH pump defective
• Control unit defective
• CH flow sensor not properly connected
• Thermal safety connection defective
• Thermal safety defective
• CH pump not running
• Connector K5 loose
• CH pump defective
9.
Safety internal malfunction in control unit
Letter Internal malfunction in control unit
(Dark Appliance receiving no mains power
display)
• Control unit defective
• Control unit defective
• Control unit defective
• Plug not inserted in wall socket
• No electricity from wall socket
• Wire loom connector K6 not connected
• Control unit fuse defective
• Mains voltage wiring defective
• Control unit defective
Malfunction messages heat pump
Status message
CH
water
display
CA 2
CA 3
CA 4
CA 5
CA 6
CA 7
CA 8
CA 10
CA 13
CA 14
CA 15
CA 16
CA 17
CA 18
CA 19
CA 20
CA 21
CA 22
CA 23
CA 24
Cause
Internal error control unit
Internal error control unit
Internal error control unit
Internal error control unit
Internal error control unit
Internal error control unit
Internal error control unit
Insufficient effect of the heat pump (temperature difference over the
heat pump to low)
Compressor temperature too high
Insufficient heat transfer to CH installation
Insufficient heat produced by the heat pump (evaporator temperature
<-20° C)
No compressor start (compressed gas temperature < air supply
temperature
Internal error control unit
Internal error control unit
Internal error control unit
Internal error control unit
Internal error control unit
Heat pump fan failure (running too fast or too slow)
Insufficient heat produced by the heat pump (evaporator temperature
> air supply temperature)
Insufficient heat produced by the heat pump (compressed gas
temperature < condenser temperature)
.
APPENDIX
Electrical diagram for the control unit of the gas boiler section: