Appendix
34
Installation and maintenance instructions geoTHERM 0020250180_00
Setting level
Values
Unit
Increment, select
Default setting
Setting
Min.
Max.
End the installation assistant?
Yes, back
1)
Can only work in conjunction with the VWZ ZK accessory.
2)
Fault lists (section 9.1) are only available, and can only be deleted, if faults have occurred.
C
Maintenance messages
Code
Meaning
Cause
Remedy
M.32
Building circuit: Pressure low
–
Pressure loss in the building circuit
due to leaks or air pockets
–
Building circuit pressure sensor is
defective
–
Check the building circuit for leaks,
top up with heating water and purge
–
Check the plug contact on the PCB
and on the cable harness; check
that the pressure sensor is working
correctly and, if required, replace the
pressure sensor
M.34
Environment circuit: Pressure low
–
Pressure loss in the environment
circuit due to leaks or air pockets
–
Environment circuit pressure sensor
defective
–
Check the environment circuit
for leaks, top up with medium
(brine/water), and purge
–
Check the plug contact on the PCB
and on the cable harness; check
that the pressure sensor is working
correctly and, if required, replace the
pressure sensor
D
Status codes
Code Meaning
Heat pump system
S.34
Heating mode: Frost protection
S.91
Service message: Demo mode
S.100
Standby
S.101
Heating: Compressor switched off
S.102
Heating: Compressor blocked
S.103
Heating: Flow
S.104
Heating: Compressor active
S.107
Heating: Overrun
S.118
Cooling: Flow
S.119
Cooling: Mixer active
S.131
Hot water: Compressor shutdown
S.132
Hot water: Compressor blocked
S.133
Hot water: Flow
S.134
Hot water: Compressor active
S.137
Hot water: Overrun
General
S.201
Check program: Purging of env. circuit active
S.202
Check program: Purging of building circuit active
S.203
Actuator test active
Communication
S.211
Connection error: Display not detected
S.212
Connection error: Control not detected
