ENG
Operating Manual | Attachment and Installation Cooling Units | Multi Controller (MC) – 400 / 460 V, 3~ | 086100124 66/76
Error no. Fault/unit behavior Possible causes Remedial measures
LED: flashes Sensor 1 Minimum:
Minimum value of the switch
cabinet temperature “Lit¯”
(display) is reached or
exceeded.
Select a higher switch cabinet
temperature setpoint.
Check switch cabinet for
leakages.
Move components located in
the vicinity of the air inlet and
air outlet further away to
prevent an air short-circuit.
(The cold air is deflected
directly to the air inlet by
components.)
Compressor: OFF
Evaporator fan (internal): ON
Condenser fan (external): ON
Heating (external): OFF
Fault signal contact:: Open
LED: flashes Sensor 1 Maximum:
Maximum value of the switch
cabinet temperature “Lit¯”
(display) is reached or
exceeded.
The cooling unit cannot cool
the air in the switch cabinet
sufficiently.
Check settings of the cooling
unit.
Clean the fins of the heat
exchanger (internal/external).
Check the function of the
evaporator fan (external).
Check the refrigeration circuit
for spilled refrigerant or
leakage.
Install a cooling unit with a
higher cooling capacity if
necessary.
Compressor: ON
Evaporator fan (internal): ON
Condenser fan (external): ON
Heating (external): OFF
Fault signal contact:: Open
LED: flashes Sensor 2 (TS2) defective. Replace sensor 2 according
to the unit type.
Sensor 2 is plugged to the
card, not permanently
soldered.
Compressor: ON
Evaporator fan (internal): ON
Condenser fan (external): ON
Heating (external): OFF
Fault signal contact:: Open
Tab. 19: Possible error messages (continued)
To Next Page
Loading...
