REMKO WKF 120 Duo - Manual (Page 47)

13 Troubleshooting and customer service
13.1 Troubleshooting and customer service
The unit has been manufactured using state-of-the-art production methods and has been tested several
times to ensure that it works properly. However, in the event that malfunctions should occur, the unit should
be checked against the following list. Please inform your dealer if the unit is still not working correctly after all
of the functional checks have been performed.
Malfunction Possible causes Remedial measures
The heat pump does
not start or switches
itself off
Power failure, under-voltage Check the voltage and, if necessary,
wait for it to come back on
Defective mains fuse / main switch
turned off
Exchange mains fuse, master switch on
Damaged power supply Repair by specialist firm
Power company disable period Wait until the power-company disable
period is over and the heat pump starts
up as required
Operational temperature limits too low
or too high
Observe temperature ranges
Setpoint temperature exceeded / incor-
rect mode
The set-point temperature has to be
higher than the heat generator temper-
ature, check mode
Disconnect the outdoor unit, then
establish the correct terminal sequence
using the connection plan Re-establish
voltage to the outdoor unit. Also make
sure that the earth conductor is con-
nected correctly.
Heating circuit pump
fails to switch off
Incorrect pump switching Arrange to have pump switching
checked in the "Heating circuit" spe-
cialist level
Heat circuit pumps fail
to switch on
Incorrect mode set Check mode
Control board fuse in indoor unit
switching cabinet faulty
Exchange the fuse on the left side of
the control board
Incorrect heating program set Check heating program We recom-
mend the operating mode "heat" in the
cold heating season
Temperature overlapping, e.g. outside
temperature greater than room temper-
ature
Check temperature ranges. Probe test!
Red indicator light Outdoor unit malfunction Contact customer service
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