167
5. Switch on the system.
6. Check the 3 phase currents on the compressor. If
the phase currents differ from one another, check
the rotating field. Replace phase connections if nec-
essary.
7. Replace inverter.
8. Replace compressor.
F.1173 Maximum number of inverter safety shutdowns interlock input 1 reached
F.1173
System characteristics
■
Output demand to heat pump not possible
■
Compressor off
Cause
Max. permissible number of shutdown processes
reached by high pressure switch PSH
Measures
1. Check the connecting cable to the high pressure
switch PSH and connections X1.3/X1.4 (STO1) on
the inverter:
■
Check wires and plugs for correct seating.
■
Check connections for contact corrosion.
■
Check cables for mechanical damage, e.g. crush-
ing, kinking, chafing or breakage.
2. Replace the high pressure switch PSH.
3. Unlock refrigerant circuit via ViGuide.
4. Check the entire safety chain.
5. Reload parameter file for inverter.
F.1174 Forced safety shutdown, compressor - interlock input 2 active
F.1174
System characteristics
■
Output demand to heat pump not possible
■
Compressor not available
Cause
Max. permissible number of shutdown processes
reached by safety circuit of the inverter
Measures
1. Isolate the system from the power supply. Wait at
least 2 min. Switch on the system.
2. Check inverter safety circuit for correct function.
3. Disconnect connection X3.1/X3.2 (STO2) from the
inverter. Check for continuity. If necessary, replace
high limit safety cut-out.
4. Replace inverter.
5. Unlock refrigerant circuit via ViGuide.
F.1175 Maximum number of inverter safety shutdowns interlock input 2 reached
F.1175
System characteristics
■
Output demand to heat pump not possible
■
Compressor not available
Cause
Max. permissible number of shutdown processes
reached by the high limit safety cut-out
Measures
1. Check the connecting cable to the high limit safety
cut-out and connections X3.1/X3.2 (STO2) on the
inverter.
■
Check wires and plugs for correct seating.
■
Check connections for contact corrosion.
■
Check cables for mechanical damage, e.g. crush-
ing, kinking, chafing or breakage.
2. Replace high limit safety cut-out.
3. Unlock refrigerant circuit via ViGuide.
Messages
Fault messages (cont.)
6218234
Diagnosis
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