Troubleshooting
21.11.2015
63 / 76
Z20469
Copyright
2013 by: WATERKOTTE GmbH. Subject to changes.
15
Troubleshooting
15.1
Possible faults and solutions
15.1.1
Fault at input side (LP fault)
Faulty extraction of water or water glycol.
Water glycol circuit insufficiently vented.
Water glycol pour point too high.
Evaporator contaminated, icy.
Refrigerant circulation interrupted (stop valve closed, filter dryer contaminat-
ed).
Dirt trap clogged.
Temperature of heat source too low.
Water in condenser too cold (below 20 °C),
Quick temperature change in condenser.
Insufficient refrigerant (see inspection glass).
Incorrect setting of controller parameter.
Sensor incorrectly aligned or insufficiently attached.
15.1.2
Fault at output side (HP fault)
Interrupted or insufficient water circulation (possibly not enough heating cir-
cuits open).
Hot water temperature too high.
Air in water circuit.
Dirt trap clogged.
Circulation pump defective or incorrect rotation direction.
Incorrect setting of controller parameter.
15.1.3
Fault in compressor motor
Overheating of motor winding; possible causes: Failure of a phase, mechani-
cal failure due to lack of lubrication, lack of refrigerant, defects in refrigerant
regulation, operation with incorrect refrigerant, excessive temperature of pres-
surised gas.
