Multi-Zone Technical Overview

REFERENCES
PAGE 109
ENGLISH
FLOW CHARTS
Caution: Be sure to turn power switch o before connecting or disconnecting the connector,
or parts may sustain damage.
NO
Turn on the unit with the remote control. Is an ERROR indicated
before the compressor starts?
IPM Module is damaged and needs to be
replaced
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.
YES
• 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 o before connecting or disconnecting the connector, or parts
may sustain damage.
LED 1 ashes 2 times
• 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 is detected by checking the operating condition of the compressor
YES