REMKO KWL 130 H - Manual (Page 15)

The unit has been manufactured using state-of-the-art production methods and tested several times to ensure its
correct function. If malfunctions should occur, please check the unit as detailed in the list below. For installations with
an indoor unit and outdoor unit, observe the chapter "Troubleshooting and customer service" in both operating
manuals.
Please inform your dealer if the unit is still not working correctly after all the function checks have been performed.
Trouble-shooting and customer service
Malfunctions
Please note that this troubleshooting table continues on the next page
Fault Effect Possible cause Remedial measures
The unit
does not
start
Display is not illuminated
No power supply
Check the current connections at the
general supply terminals and the voltage
values.
Check breaker switches/fuses at the
secondary side of the supplemental
transformer.
Incorrect phase sequence.
The KA3 phase sequence relay
did not enable.
Replace current supply phase conductor at
the terminal strip on the switch panel.
The display is illuminated but
he unit does not start
Unit in STAND BY
See paragraph "Key functions" for the
activation of the system.
The display shows OFF No external enabling
Check connection to terminals 2-3
(external enabling).
The unit does not start, the
compressor icon in the display
is flashing.
Delay time
Wait out the delay time (max 360 sec.),
the compressor should then start.
The lower display flashes
and alternately shows an
alphanumeric code and the
temperature value.
One or more protective
devices have responded
Check which safety device has responded,
correct the cause of the fault and reset the
safety device (see "Fault display").
Compressor protection is
defective.
Does the compressor icon light
up and does the protection
have voltage?
Have specialist replace protection or
compressor.
The unit
is working
with
reduced
cooling/
heating
capacity
Thermal load was increased.
Have structural modifications
been made?
Maintain safety clearances.
Supply temperature too high.
If the supply temperature is
approx. 5 ... 10 ℃?
Reduce return temperature
Air in the medium circuit
Are automatic bleeders
installed at the highest point?
Vent manually or install automatic
bleeders.
Condenser temperature too
high.
Are the fins clean and the
operating limits adhered to?
Clean fins, provide shade for the unit,
adhere to operating limits
Incorrect parameter setting. Check setting. Change setting.
Pulse mode because of too
little demand.
Is the system oversized?
Increase medium flow with the installation
of a storage tank.
Medium
discharge
Leak in the lines or insulation
defective.
Are there leaks and are all of
the lines insulated?
Seal and insulate.
Defrosting phase in heating
mode.
Heating mode set? Normal operating status.
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