Midea MC-SU30-RN1L Service Manual

Aqua Tempo Super II
201709 67
Part
4 - Diagnosis and Troubleshooting
4.11 P4, P5 Troubleshooting
Digital display output 4.11.1
Description 4.11.2
 P4 indicates current protection on Phase B.
 P5 indicates current protection on Phase C.
 When the compressor current rises above the protection value 25A, the system displays P3 or P4 protection and all
units stop running. When the current returns to the normal range, P3 or P4 is removed and normal operation
resumes. When P3 or P4 error occurs 5 times in 120 minutes, a manual system restart is required before the system
can resume operation.
 Error code is displayed on main PCB and user interface.
Possible causes 4.11.3
 Power supply abnormal.
 Poor condenser heat exchange.
 High pressure side blockage.
 Excess refrigerant.
 System contains air or nitrogen.
 Inverter module damaged.
 Compressor damaged.
 Main PCB damaged.

Midea MC-SU30-RN1L Specifications

General

Brand	Midea
Model	MC-SU30-RN1L
Category	Chiller
Language	English