MCAC-TSM-2008-02 Outdoor units
Outdoor units 55
4. Electric protection Er41:
1) Phase protection of power supply:
When the chiller is powered on, if there is wrong sequence of power phase, lack of power phase, it will
show Er41, the chiller can not run.
2) Compressor current protection:
If the operating current of compressor reaches the value below, system stops and shows Er41:
Capacity ( kW) Compressor current value (A) Capacity ( kW) Compressor current value (A)
5 18 10(3N) 18
7 18 12 25
9 32 14 25
10(1N) 32 16 25
Values display indication Er41
Judge 1: Whether the phase sequence of the power line is
wrong connected or one phase of the power line is broken off.
Connect the power line
well in sequence.
Yes
No
Judge 2: Compressor current protection
Check whether the compressor current reaches the value in
the above table
Judge 3: PCB is malfunction
Replace PCB
No
Yes
Check whether the refrigerant
pipe is air-logged.
Yes
Dredge the refrigerant pipe.
Check whether the compressor is locked.
Replace the compressor.
Yes
No
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