The system has been manufactured using state-of-the-art production methods and in house tested many times to
ensure the
unit
is 100% in working order. If malfunctions should occur, please check the system as detailed in the list
below. For installations with an indoor-outdoor system, observe the chapter “Trouble-shooting and customer serv-
ice” in both operating manuals.
Please inform your dealer if the system is still not working correctly after all the function checks have been per-
formed.
Touble-shooting and customer service
Code Alarm type
A1
Antifreeze alarm medium cycle
B2
Medium volume in the system too
low; Water volume too low
Increase the medium temperature above
+4°C; set the antifreeze setpoind
AHt
Excessive temperature at start
B1 / P16 Medium inlet temperature too high Reduce medium inlet
ALt
Insufficient/or excess temperature at
start C/H
B1 / P19 Medium inlet temperature too high Reduce medium inlet
E1
Temperature
probe medium inlet
defec
tive
B1
Medium
inlet
probe defective
Check resistance at B1
E2
Temperature probe medium outlet
defective
B2
Medium outlet probe defective
Check resistance at B2
E3
Temperature probe condenser defec-
tive
B3
Condenser probe defective
Check resistance at B3
E4
Pressure tranceducer refrigerant
cycle defective
Bn/V+
Ambient temperature probe
pressure transducer defective
Check voltage at B4
EHS
High supply voltage controller
Supply voltage too high
Check the voltage of the
transformer (both sides)
ELS
Low supply voltage controller
Tr
Supply voltage too low
Check the voltage of the
transformer (both sides)
EP1
EEPROM driver defective
Internal controller error
Replace the controller
EPb
EEPROM alarm at start
Config.
Internal controller error
Replace the controller
EPr
EEPROM alarm during operation
Config.
Internal controller error
Replace the controller
FL
Flow
switch
has responded
ID1
Differential switch / Flow switch
is activated
Are the following points OK:
- Medium flow rate
- No air in the medium cycle
- Circulation pump
- Operation of the flow switch
- Shut-off valves open
- Medium pressure too low
Ht
Excessive temperature medium inlet B1 / P16 Is the medium inlet temperature
above 50°C?
Reduce temperature of the medium
HP1
Pressure switch HD refrigerant cycle
ID3
refrigerant pressure too high
clean the condenser, check the conden-
ser fan, fan speed control and 4-way-
valve
HP1
Tranceducer cycle excess pressure
Bn/V+
refrigerant pressure too high
clean the condenser, check the conden-
ser fan, fan speed control and 4-way-
valve
LP1
Pressure switch ND refrigerant cycle
ID4
ambient or medium temp. too low,
refrigerant cycle leaky
Reports
LA
General reports
P08
D1
Report defrosting
Defrost cycle active
dF1-2
Defrosting time exce
eded
Defrosting
period
Time of defrost cycle too long
Reset
1. Alarms with automatic reset:
The reset is carried out automatically.
2. Alarms with manual reset:
The reset can only be carried out by a specialist after the reason for the alarm has been solved.
3. Alarms with semi-manual reset: The reset is first carried out automatically, afterwards only a manual reset is possible by a specialist, after the reason for the alarm
has been solved.
Alarm indicated by code
