Haier AW07LC2VHA Technical Overview page 101

LED 1 flashes 2 times
IPM protection is detected by checking the operating condition of the compressor
• The sytem leads to IPM protection due to overcurrent
• A compressor fault leads to IPM protection
• Circuit component of IPM is broken and leads to IPM protection
• IPM protection due to compressor fault
• IPM protection due to faulty PCB of IPM module
• Circuit component of IPM is broken and caused IPM protection
Caution: Be sure to turn power switch off before connecting or disconnecting the connector,
Caution: Be sure to turn power switch off before connecting or disconnecting the connector, or parts
or parts may sustain damage.
may sustain damage.
Turn on the unit with the remote control. Is an ERROR indicated
before the compressor starts?
Does the compressor start
normally, but malfunctions are
reported after it has run for some
time?
1. The system may have been over or under charged with refrigerant, which can be determined by evaluating
the pressure of the system
2. The shaft of the compressor is seized, and the compressor needs to be replaced.
FLOW CHARTS
NO
YES
REFERENCES
YES
IPM Module is damaged and needs to be
replaced
PAGE 101