Hc Pfc Protection - Toyotomi KURO Mini Service Manual

TOYOTOMI
Troubleshooting：
Compressor out -of-step protection
Compressor3-phase wire connection is
lack of phase or phased -reversing?
Compressor phase wire connection is
3.4.22 ―HC‖ PFC Protection
Error display: ODU mainboard, IDU wired control and IDU receiver light board will display
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.
H7
NO
bad?
Error still exists ?
U-Match 5 SERIES UNIT SERVICE MANUAL
YES
Connect wires according to
the phase sequence
YES
Fasten or replace the
compressor phase wires
NO
Replace the drive board .
YES
Replace the compressor .
60
HC