Gree GUD50T/A-T Service Manual

GREE U-Match 5 SERIES UNIT SERVICE MANUAL
60
Troubleshooting：
H7
Compressor out -of-step protection
Connect wires according to
the phase sequence
Compressor3-phase wire connection is
lack of phase or phased-reversing?
YES
Compressor phase wire connection is
bad?
NO
YES
Fasten or replace the
compressor phase wires
Error still exists ?
NO
Replace the compressor .
YES
Replace the drive board.
3.4.22 ―HC‖ PFC Protection
Error display: ODU mainboard, IDU wired control and IDU receiver light board will display HC
Error judgment condition and method:
After power is connected, and drive chip received IPM lead F0 that is of low level, than it is IPM module
malfunction. System will shut down for protection.
Possible reason:
■Power grid voltage is abnormal.
■Drive board PFC module is damaged.
■Drive board IPM module‘s 15V power supply is lower than 13.5V.
■Drive board PWM signal for PFC and the corresponding element are abnormal.
■Drive board PFC current sampling circuit element is damaged or drive chip current sampling AD terminal is
abnormal.

Gree GUD50T/A-T Specifications

General

Brand	Gree
Model	GUD50T/A-T
Category	Air Conditioner
Language	English