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Midea ATOM MDV-V56WDHN1(AtB) - Page 73

Midea ATOM MDV-V56WDHN1(AtB)
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Atom B Series VRF 50/60Hz
72
Midea
Atom B
Series
Service Manual
2.18 P4: Discharge temperature protection (For all models)
2.18.1 Digital display output
P4
2.18.2 Description
Discharge temperature protection.
The system stops running.
Error code is displayed on the unit with the error.
2.18.3 Trigger / recover condition
Trigger condition: Discharge temperature (T5) > 115
o
C.
Recover condition: Discharge temperature (T5) < 90
o
C.
Reset method: Resume automatically.
2.18.4 Possible causes
Temperature sensor/switch not
connected properly or has malfunctioned.
Insufficient refrigerant.
System blockage.
Indoor load too large.
System contains air or nitrogen.
Poor condenser heat exchange.
Main PCB damaged.

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