52
Installation and Maintenance
Service Manual
23 PFC protection
HC
□
■
☆
☆
During cooling and
drying operation,
compressor and
outdoor fan stop
while indoor fan
operates. During
heating operation, all
loads stop.
See 9.3 (diagnosis of
PFC protection)
Refer to
maintenance
flowchart
24
Desynchronizing
of compressor
H7
□
☆
■
☆
During cooling and
drying operation,
compressor and
outdoor fan stop
while indoor fan
operates. During
heating operation, all
loads stop.
See 9.3 (diagnosis
of IPM protection,
desynchronizing
malfunction,
overcurrent
protection of
phase current of
compressor)
Refer to
maintenance
flowchart
25
Failure startup
Lc
□
☆
□
☆
During cooling and
drying operation,
compressor and
outdoor fan stop
while indoor fan
operates. During
heating operation, all
loads stop.
See 9.3 (diagnosis of
failure startup)
Refer to
maintenance
flowchart
26
Circuit malfunction
of phase current
circuit detection for
compressor
U1
□
☆
■
□
During cooling and
drying operation,
compressor and
outdoor fan stop
while indoor fan
operates. During
heating operation, all
loads stop.
Hardware
malfunction of
outdoor unit's main
board;
1. Replace outdoor
unit's main board
AP1
