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Operating Manual | Roof-mounted Cooling Unit | Multi Controller (MC) – 230 V | 086100023d 70/80
Error no. Fault/unit behavior Possible causes Remedial measures
LED: flashes Antifreeze (option):
Antifreeze-Sensor ≤ 1°C.
Safety cut-out because the
evaporator is threatening to
ice up.
Restart operation after
condensate has evaporated.
A restart is only possible by
disconnecting and
reconnecting the mains
voltage.
No other reset is provided for
safety reasons.
Clean the fins of the heat
exchanger (internal/external).
Check switch cabinet for
leakages.
Select a higher switch cabinet
temperature setpoint.
Check the evaporator fan
(internal) function.
Compressor: OFF
Evaporator fan (internal): OFF
Condenser fan (external): OFF
Heating (external): OFF
Fault signal contact:: Open
LED: flashes Sensor 5 (TS5) defective.
Replace sensor 5 or the
controller card according to
the unit type.
Compressor: OFF
Evaporator fan (internal): OFF
Condenser fan (external): OFF
Heating (external): OFF
Fault signal contact:: Open
Tab. 12: Possible error messages (continued)
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