27
SET Energietechnik Ltd. * August-Blessing-Str. 5 * D-71282 Hemmingen * Tel.: +49 (0)7150 9454-0 Fax: +49 (0)7150 2337
Heat pump troubleshooting table
It is essential to disconnect the device from the mains before undertaking electrical work!
Work on the refrigeration part may only be carried out by experts.
Complaint
Possible fault
Possible cause and solution
As a general rule in
the event of faults:
Check all cable contacts to the regulator and on the protection
plate for tightness and possible arcing spots. Error codes in the
regulator indicate the cause of the fault
Device is not working
Infeed interrupted
Check back-up fuse, FI circuit-breaker
and motor protection switch
No requirement
Increase pool water temperature target
value
Flow monitor has tripped
Increase the amount of water, increase
heat pump upstream pressure
FI switch switches off
Check FI switch (type B), check and, if
necessary, replace crankcase heater,
short-circuit, check external consumers
Fan and compressor
at standstill
Motor protection switch has
tripped
(error code A09)
Fault in the power supply (phase L1-
L2-L3
failed),
measure
power
consumption of compressor and adjust
motor protection switch
Time delay in progress (LED
lit in the upper left-hand corner
of the regulator)
Wait for time delay (6min.)
Fan and compressor
“pulsing” (starting up
briefly) or switching
off prematurely
Fault in the refrigeration circuit
Device dirty, air openings dirty
Low pressure fault
(error code A02)
Evaporator dirty, faulty fan, lack of
refrigerant.
Very cold water and low outside
temperature, throttle water quantity at
the output valve
High pressure fault
(error code A01)
Check water deficiency and circulation
pump, increase water quantity
Motor protection switch
works automatically
Check motor protection switch setting