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This unit was manufactured using the latest production methods and tested repeatedly for perfect function.
If malfunctions still occur, please check the list according to the list below. In case of systems with indoor and
outdoor units, the "Troubleshooting and customer service" chapters in both operating instructions must be ob-
served. If all functional checks have been performed and the unit is still not functioning perfectly, please notify
your closest dealer.
Troubleshooting and customer service
Malfunction
Please observe the continuation of this fault remedy table on the next page
Fault Code Effect Possible cause Remedy
The
unit does
not start
The display does not light up. No power supply
Check the power connections at the
general supply terminals and check the
voltage values.
Check the fuses on the secondary side
of the additional transformer.
APS /
ASPh
The phase sequence relay does
not switch through.
Incorrect phase sequence.
The phase sequence relay
KA3 does not grant an
enable.
- LED not active.
Exchange the external conductor of the
power supply on the terminal strip on
the control panel.
The display is lit, but the unit
does not start.
Unit in standby
See the "Button functions" section for
the activation of the system.
OFF
The display indicates "OFF." No external enable
Check the connection to Terminals 2-3
(external enable).
The unit does not start and
the compressor symbol flashes
on the display.
Start-up delay
Wait until the start-up delay is over
(max. 360 sec.), after which the
compressor should start
The lower display flashes
and alternatively shows an
alphanumerical code and the
temperature value.
One or more of the
safety devices reacted
Check which safety device has reacted,
remedy the cause of fault, and reset the
safety device (see "Resetting faults")
C(n)tr
Compressor contactor defec-
tive, overcurrent protection
switch;
compressor reacted.
Does the compressor
symbol light up and is the
contactor energised?
Have the contactor or compressor
exchanged by a specialist company.
The unit
works
at a
reduced
cooling/
heating
capacity
The thermal load was in-
creased in the cooling mode.
Has a structural change
been made?
Observe safety distances.
C: Inlet flow temperature too
high.
H: Inlet flow temperature too
low.
Does the inlet flow
temperature amount to
about C = 5 - 10°C,
H = 35 - 50°C?
Reduce (C) or increase (H) the return
temperature.
Air in the medium circuit.
Have automatic bleed-
ers been installed at the
highest point?
Bleed manually or install an automatic
bleeder.
Condensation temperature too
high.
Are the fins clean and
have the operating limits
been observed?
Clean the fins, shade the unit, and ob-
serve the operating limits.
Incorrect parameter setting. Check the setting. Change the settings.
Inching mode due to low
demand.
Is the system oversized?
Increase the medium volume flow rate
by installing a storage tank.
Medium
outlet
Pipe leakage or insulation
defects.
Is leakage present and
are all lines insulated?
Seal off and insulate.
Thawing phase during heating
mode.
Is the heating mode set? Normal operating state.
REMKO KWG
18
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