Trouble-Shooting And Customer Service - REMKO KWL 130 Operation Manual

Trouble-shooting and customer service

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.
Malfunctions
Fault Effect
Display is not illuminated
The display is illuminated but
he unit does not start
The unit
does not
The display shows OFF
start
The unit does not start, the
compressor icon in the display
is flashing.
The lower display flashes
and alternately shows an
alphanumeric code and the
temperature value.
Compressor protection is
defective.
Thermal load was increased.
Supply temperature too high.
The unit
is working
Air in the medium circuit
with
reduced
cooling/
Condenser temperature too
heating
high.
capacity
Incorrect parameter setting.
Pulse mode because of too
little demand.
Leak in the lines or insulation
defective.
Medium
discharge
Defrosting phase in heating
mode.
Please note that this troubleshooting table continues on the next page
Possible cause
No power supply
Incorrect phase sequence.
The KA3 phase sequence relay
did not enable.
Unit in STAND BY
No external enabling
Delay time
One or more protective
devices have responded
Does the compressor icon light
up and does the protection
have voltage?
Have structural modifications
been made?
If the supply temperature is
approx. 5 ... 10 ℃?
Are automatic bleeders
installed at the highest point?
Are the fins clean and the
operating limits adhered to?
Check setting.
Is the system oversized?
Are there leaks and are all of
the lines insulated?
Heating mode set?
Remedial measures
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.
Replace current supply phase conductor at
the terminal strip on the switch panel.
See paragraph "Key functions" for the
activation of the system.
Check connection to terminals 2-3
(external enabling).
Wait out the delay time (max 360 sec.),
the compressor should then start.
Check which safety device has responded,
correct the cause of the fault and reset the
safety device (see "Fault display").
Have specialist replace protection or
compressor.
Maintain safety clearances.
Reduce return temperature
Vent manually or install automatic
bleeders.
Clean fins, provide shade for the unit,
adhere to operating limits
Change setting.
Increase medium flow with the installation
of a storage tank.
Seal and insulate.
Normal operating status.
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