Midea ATOM B Series Service Manual page 75

Atom B Series VRF 50/60Hz
2.19 P5: Outdoor heat exchanger temperature protection (For all models)
2.19.1 Digital display output
P5
2.19.2 Description
 Outdoor heat exchanger temperature protection.
 The system stops running.
 Error code is displayed on the unit with the error.
2.19.3 Trigger / recover condition
 Trigger condition: Outdoor heat exchanger temperature (T3) ≥ 62
 Recover condition: Outdoor heat exchanger temperature (T3) < 52
 Reset method: Resume automatically.
2.19.4 Possible causes
 Temperature sensor not connected properly or has malfunctioned.
 Indoor load too large.
 System contains air or nitrogen.
 Poor condenser heat exchange.
 High pressure side blockage.
 Main PCB damaged.
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