Troubleshooting
04.12.2015
35 / 48
Copyright
2014 by: WATERKOTTE GmbH. Subject to changes.
11
Troubleshooting
11.1
Possible faults and solutions
11.1.1
Fault at input side (LP fault)
Motor protection of the source pump is activated, possibly incorrect set-
ting.
Faulty extraction of water or water glycol.
Water glycol circuit insufficiently vented.
Water glycol pour point too high.
Evaporator contaminated, icy.
Incorrect rotation direction of source pump.
Refrigerant circulation interrupted (stop valve closed, filter dryer contam-
inated).
Dirt trap clogged.
Temperature of the 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 the controller parameter.
Sensor incorrectly aligned or insufficiently attached.
11.1.2
Fault at output side (HP fault)
Motor protection of the heat pump is activated, possibly incorrect set-
ting.
Interrupted or insufficient water circulation (possibly not enough heating
circuits open).
Hot water temperature too high.
Air in water circuit.
Dirt trap clogged.
Defective circulation pump or incorrect rotation direction.
Incorrect setting of the controller parameter.
11.1.3
Fault in circulation pumps
Motor protection is activated.
11.1.4
Fault in compressor motor
Overheating of motor winding; possible causes: Failure of a phase, me-
chanical failure due to lack of lubrication, lack of refrigerant, defects in
refrigerant regulation, operation with incorrect refrigerant, excessive
temperature of pressurised gas.
