Atmos CombinAir Manual

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 et button button
2 Reset button button
3 hot water button button
4 hot water LED LED
5 tatus 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 : Press the ‘Set’ button or 5 seconds until the letter C. appears
• Next setting : Press the ‘Set’ button
• Di erent value : Press the ‘Hot Water’ button
• Exit program : Press the ‘Reset’ button
Status
display
CH
water
display
Function Setting
88 CH flow temperature °C
C. 0.0 CH pressure sensor is de-activated
8.8 CH water pressure Bar
F. 88 Last malfunction (gas boiler)
G. 88 Last blocking (gas boiler)
H. 88 Last malfunction (heat pump)
J. 88 Last blocking (heat pump)
L. 88 Last warning (heat pump)
S. 00 Non standard setting
INSTALLER PROGRAM
The installer program is identified by permanently illuminated letter without a dot.
• Access : Press the ‘Set’ button or 10 seconds until the letter A appears
• Next setting : Press the ‘Set’ button
• Di erent value : Press the ‘Hot Water’ button
• Exit program : Press the ‘Reset’ button
• To enter sub-menu : Press the ‘Hot Water’ button
Status
display
CH water
display
Description Remarks
A ??
LL / ??
HH / ??
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
Adjusting O2% / CO2%
b b ubmenu sensor values ub-menu sensor values
c 01
02
03
04
05
06
One temperature zone with WDC without
RT
One temperature zone WDC with RT
Two temperature zones, linked control:
Two temperature zones, linked control:
Two temperature zones:
Two temperature zones:
Heat pump WDC without
RT, Gas boiler WDC
without RT
Heat pump WDC with RT,
Gas boiler WDC with RT
Heat pump WDC without
RT, gas boiler WDC
without RT
Heat pump WDC without
RT, gas boiler WDC with
RT

07
08
09
10
Two temperature zones:
Two temperature zones:
Two temperature zones:
Two temperature zones:
Heat pump WDC without
RT, gas boiler no WDC
Heat pump WDC with RT,
gas boiler WDC without
RT
Heat pump WDC with RT,
gas boiler WDC with RT
Heat pump WDC with RT,
gas boiler no WDC
d b ubmenu CH- settings heat pump (LT zone) ee settings heat pump
E b ubmenu CH- settings gas boiler (HT zone) ee settings gas boiler
F ?1 / ?2 Last malfunction (lock-out) ?1 = fault serial number
?2 = fault code
G ?1 / ?2 Last blocking ?1 = serial number of
blocking
?2 = blocking code
H 0.0
0.1
0.2
0.3
0.4
1.0
24
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
P 00
03
06
heating delay off
heating delay 3 [min]
heating delay 6 [min]
delay in responding to a
call for space heating
after the last firing for
space heating
q 05
10
15
20
Frost protection gas boiler 5ºC
Frost protection gas boiler 10ºC
Frost protection gas boiler 15ºC
Frost protection gas boiler 20ºC
S 00
11
22
Non standard settings
Standard settings NL/B
tandard settings D
t ?? Appliance recognition ee blocking messages
u b ubmenu settings heat pump ee 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
CH water display Description Remarks
b / A 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
Number
b / P Value Heat pump blend temperature ºC
b / q Value Heat pump system temperature ºC
b / r Value election resistance 2
Number
b / t Value election resistance 1
Number
b / u Value Outside temperature 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
CV water
display
Description Remarks
d / h 01
03
05
Overrun time CH pump heat pump 1 minute
Overrun time CH pump heat pump 3 minutes
Overrun time CH pump heat pump 5 minutes
d / H 10
20
30
40
50
60
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
d / o 12
…
20
…
24
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
Adjustable in
increments
of 1 ºC
d / O 15
…
30
…
25
…
50
WDC flow temperature 15 ºC at base point d / o
WDC flow temperature .... ºC at base point d / o
WDC low 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
Adjustable in
increments
of 1 ºC
d / P -5
…
2
…
10
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
Adjustable in
increments
of 1 ºC
d / q 12
15
18
21
24
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
d / S 4
6
8
10
WDC switching difference 4 ºC
WDC switching difference 6 ºC
WDC switching di erence 8 ºC
WDC switching difference 10 ºC
d / t 1
2
4
6
Waiting time for switching on the gas boiler 30 minutes
Waiting time for switching on the gas boiler 60 minutes
Waiting time or switching on the gas boiler 120 minutes
Waiting time for switching on the gas boiler 180 minutes
d / u -15
…
-10
…
0
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
Adjustable in
increments
of 1 ºC
d / U 25
…
40
…
80
WDC flow temperature 25 ºC at climate point d / u
WDC flow temperature … ºC at climate point d / u
WDC low 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
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
CH water
display
Description Remarks
E / h 40
…
80
…
90
CH flow maximum temperature 40 ºC
Adjustable in increments of 1 ºC
CH low maximum temperature 80 ºC
Adjustable in increments of 1 ºC
CH flow maximum temperature 90 ºC
Only available
when
installation
type = 10
E / h 01
03
05
Overrun time CH pump heat pump 1 minutes
Overrun time CH pump heat pump 3 minutes
Overrun time CH pump heat pump 5 minutes
E / H 10
20
30
40
50
60
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
E / L 00
05
10
15
Low capacity burner time off
Low capacity burner time 5 minutes
Low capacity burner time 10 minutes
Low capacity burner time 15 minutes
E / n 00
02
05
10
Accelerated heating off
Accelerated heating 2 minutes
Accelerated heating 5 minutes
Accelerated heating 10 minutes
E / o 12
…
20
…
24
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
Adjustable in
increments of
1 ºC
E / O 15
…
30
…
25
…
50
WDC flow temp. 15 ºC at base point E(d) / o
WDC flow temp. .... ºC at base point E (d) / o
WDC low 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
Adjustable in
increments of
1 ºC
E / P -5
…
2
…
10
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
Adjustable in
increments of
1 ºC
E / q 12
15
18
21
24
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
E / S 4
6
8
10
WDC switching difference 4 ºC
WDC switching difference 6 ºC
WDC switching di erence 8 ºC
WDC switching difference 10 ºC

E / u -15
…
-10
…
0
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
Adjustable in
increments of
1 ºC
E / U 25
…
40
…
80
WDC flow temp. 25 ºC at climate point E(d) / u
WDC flow temp … ºC at climate point E(d) / u
WDC low 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
Adjustable in
increments of
1 ºC
Adjustable in
increments of
5 ºC
E / Y 07
15
24
Capacity limitation gas boiler 7 kW
Capacity limitation gas boiler 15 kW
Capacity limitation gas boiler 24 kW
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
CV water
Display
Description Remarks
u / C 6-
66
AA
Blending valve heat pump Don’t adjust!
u / F 1
…
12
…
15
Fan speed heat pump
Fan speed heat pump
Fan speed heat pump
Fan speed heat pump
Fan speed heat pump
Adjustable in increments
of 1 between 1 and 15
u / P 1
…
15
CH pump setting (heat pump)
CH pump setting (heat pump)
CH pump setting (heat pump)
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. Mal unction 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 Function
1 Hot water heating
operating
2 Central heating operating
No dot No burner
Slow lashing dot Minimum fire
Increasingly ast lashing dot Higher & higher firing
Constant dot 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
Diagnosis
b Incorrect DHW reading; value <-10 or > 118°C
c Incorrect CH water pressure; value between 0 and 0,5 bar or 3
and 9 bar (capacity is limited to low setting
d Incorrect CH return sensor reading; value <-10 or > 118°C
h 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
CH water
display
Diagnosis
c HH
LL
CH flow temperature sensor error; > 118°C
CH flow temperature sensor error; < -10°C
C CH water pressure lower than 1 bar
F Mains frequency error
H Internal error (control unit)
L Electrical mains plug error – correct supply polarity
n Mains or reference voltage too low
HH Appliance type recognition error; value > 118°C
LL Appliance type recognition error; value < -10°C
10 Appliance type recognition error; control unit is set to 24/80
11 Appliance type recognition error; control unit is set to 24/80+
20 Appliance type recognition error; control unit is set to 32/80
t 21 Appliance type recognition error; control unit is set to 32/80+
22 Appliance type recognition error; control unit is set to 30/50+
30 Appliance type recognition error; control unit is set to 38/80+
40 Appliance type recognition error; control unit is set to Combipact
50 Appliance type recognition error; control unit is set to CombinAir
60 Appliance type recognition error; control unit is set to CombinAirCool
Mal unction 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 CH water
display
Diagnosis
1 Blocking 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
4 Ionisation signal absent during heat supply
4. Ionisation signal remains present after heat supply
6 Gas valve control defective
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
9. afety internal malfunction in control unit
Letter Internal malfunction in control unit
(Dark display) 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
Diagnosis CH
water
display
Cause
b 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
HH • 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.
• ensor defective
• Control unit defective
LL • CH temperature < -10°C
• hort circuit in temperature wiring
• ensor defective
• Control unit defective
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.
0 – 0,5
Bar
• 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
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
HH • ee cause of HH for warning code b.
LL • ee cause of LL for warning code b
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)
HH • ee cause of HH for warning code b
LL • ee 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. o resetting is not necessary. The possible
causes are described below in order of probability. Also look for the malfunction in this order.
Status
display
CH water
display
Diagnoses Cause
c HH 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.
• ensor defective
• Control unit defective
LL CH flow temperature < -10°C
(access through submenu sensor values in
the installer program)
• hort circuit in temperature wiring
• ensor defective
• Control unit defective
C Appliance blocked because CH system
pressure is too low
• CH pressure lower than 1 bar
F Mains frequency error • If this blocking occurs frequently or
for a long period, replace control unit
H Internal error (control unit) • If this blocking occurs frequently or
for a long period, replace control unit
L Electrical mains supply • Mains supply has wrong polarity
• Not earthed
• Ionisation electrode earth wire loose
• Control unit defective
n Mains or reference voltage too low • Mains voltage < 200 Volts
• Mains voltage insufficient
• Control unit defective
HH Appliance type recognition error; value >
118°C
• Control unit selected incorrectly
• election resistance defective
• Control unit defective
LL Appliance type recognition error; value < -
10°C
10 Appliance type recognition error; control unit
is set to 24/80
11 Appliance type recognition error; control unit
is set to 24/80+
20 Appliance type recognition error; control unit
is set to 32/80
t 21 Appliance type recognition error; control unit
is set to 32/80+
22 Appliance type recognition error; control unit
is set to 30/50+
30 Appliance type recognition error; control unit
is set to 38/80+
40 Appliance type recognition error; control unit
is set to 24/33
50 Appliance type recognition error; control unit
is set to CombinAir
60 Appliance type recognition error; control unit
is set to CombinAirCool

Blocking messages heat pump
Status
message
CH water
display
Cause
CE 25 Internal error control unit
CE 26 Internal error control unit
CE 27 Internal error control unit
CE 28 Internal error control unit
CE 37 Condenser temperature sensor error (<-30 [° C], open circuit)
CE 38 Compressed gas sensor error (<-30 [° C], open circuit)
CE 40 Heat flow temperature sensor error (<-30 [° C], open circuit)
CE 41 Evaporator temperature sensor error (<-30 [° C], open circuit)
CE 42 Air flow temperature sensor error (<-30 [° C], open circuit)
CE 43 Heat mixing temperature sensor error (<-30 [° C], open circuit)
CE 44 ystem temperature sensor error (<-30 [° C], open circuit)
CE 45 Condenser temperature sensor error (> 90 [° C], shorted)
CE 46 Compressed gas sensor error (> 90 [° C], shorted)
CE 48 Heat flow temperature sensor error (> 90 [° C], shorted)
CE 49 Evaporator temperature sensor error (> 90 [° C], shorted)
CE 50 Air flow temperature sensor error (> 90 [° C], shorted)
CE 51 Heat mixing temperature sensor error (> 90 [° C], shorted)
CE 52 ystem temperature sensor error (> 90 [° C], shorted)
CC 01 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.
CC 02 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.
CC 03 Mix temperature imbalance. This will probably be caused by air in the system.
CC 04 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.
Mal unction 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. hould the control unit fail to unlock, try again after approximately 20 seconds. Also look for the
malfunction in this order.
Code Diagnosis Cause
Status
display
1 Blocking occurred for longer than one hour • ee
last blocking gas boiler (through user
program)
2 Fan defective (5 Hz deviation per minute) • Fan not turning
• Fan’s electrical connection loose or improperly
connected
• Control unit defective
3 Incorrect ionisation (flame) signal • Gas valve remains open
• Control unit defective
3. No ionisation (flame) signal during start-up
procedure
• No gas supply
• Gas tap closed
• Gas valve defective
• Gas valve’s electrical connection loose or

improperly connected
• Air supply obstructed
• Flue tube obstructed
• iphon 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
4 Ionisation signal absent during heat supply • Insufficient gas supply
• yphon 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
4. Ionisation signal remains present after heat
supply
• Gas valve defective, remains open
• Control unit defective
6 Gas valve control defective • Wiring error
• Control unit defective
7 Insufficient flow of CH water during DHW
demand
• 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
7. Insufficient flow of CH water during CH
demand
• 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)
8 Maximum thermostat cuts out and CH water
pressure was < 0,5 bar
• 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
9 Maximum thermostat cuts out and CH flow
sensor was > 80°C
• 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
9. afety internal malfunction in control unit • Control unit defective
Letter Internal malfunction in control unit • Control unit defective
(Dark
display)
Appliance receiving no mains power • 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
Mal unction messages heat pump
Status message CH
water
display
Cause
CA 2 Internal error control unit
CA 3 Internal error control unit
CA 4 Internal error control unit
CA 5 Internal error control unit
CA 6 Internal error control unit
CA 7 Internal error control unit
CA 8 Internal error control unit
CA 10 Insufficient effect of the heat pump (temperature difference over the
heat pump to low)
CA 13 Compressor temperature too high
CA 14 Insufficient heat transfer to CH installation
CA 15 Insufficient heat produced by the heat pump (evaporator temperature
<-20° C)
CA 16 No compressor start (compressed gas temperature < air supply
temperature
CA 17 Internal error control unit
CA 18 Internal error control unit
CA 19 Internal error control unit
CA 20 Internal error control unit
CA 21 Internal error control unit
CA 22 Heat pump fan failure (running too fast or too slow)
CA 23 Insufficient heat produced by the heat pump (evaporator temperature
> air supply temperature)
CA 24 Insufficient heat produced by the heat pump (compressed gas
temperature < condenser temperature)

.
APPENDIX
Electrical diagram or the control unit o the gas boiler section: