Lennox LNINVE052 Service Manual page 61

24 PFC protection HC
Desynchronizing
25 H7
of compressor
26 Failure startup Lc
Circuit
malfunction of
27 phase current U1
circuit detection
for compressor
58
Flash
6 times
□ ■ ☆
every 3s
Flash
7 times
□ ☆ ■
every 3s
Flash
11 times
□ ☆ □
every 3s
Flash
13 times
□ ☆ ■
every 3s
During cooling
and drying
operation,
compressor and
See 9.3
outdoor fan stop
(diagnosis of PFC
☆
while indoor
protection)
fan operates.
During heating
operation, all
loads stop.
During cooling
See 9.3
and drying
(diagnosis of
operation,
IPM protection,
compressor and
desynchronizing
outdoor fan stop
malfunction,
☆
while indoor
overcurrent
fan operates.
protection of
During heating
phase current of
operation, all
compressor)
loads stop.
During cooling
and drying
operation,
compressor and
See 9.3
outdoor fan stop
(diagnosis of
☆
while indoor
failure startup)
fan operates.
During heating
operation, all
loads stop.
During cooling
and drying
operation,
compressor and Hardware
outdoor fan stop malfunction of
□
while indoor outdoor unit's
fan operates. main board;
During heating
operation, all
loads stop.
Service Manual
Refer to
maintenance
flowchart
Refer to
maintenance
flowchart
Refer to
maintenance
flowchart
1. Replace
outdoor unit's
main board
AP1
Installation and Maintenance