Lennox LNINVE052 Service Manual page 55

High discharge
temperature
3 E4
protection of
compressor
Overcurrent
4 protection E5
Communication
5 malfunction E6
Overload
6 E8
protection
52
Flash
4 times
every 3s
Flash
5 times
every 3s
Flash
6 times
every 3s
Flash
8 times
every 3s
During cooling
and drying
operation,
compressor and
outdoor fan stop
■ □ ■ ☆
while indoor
fan operates.
During heating
operation, all
loads stop.
During cooling
and drying
operation,
compressor and
outdoor fan stop
□ ■ ☆ □
while indoor
fan operates.
During heating
operation, all
loads stop.
During cooling
and drying
operation,
compressor and
outdoor fan stop
□ □ □ ☆
while indoor
fan operates.
During heating
operation, all
loads stop.
During cooling
and drying
operation,
compressor and
outdoor fan stop
■ □ ■ ■
while indoor
fan operates.
During heating
operation, all
loads stop.
Service Manual
See 9.3
(diagnosis of
Refer to
overheating
maintenance
prevention
flowchart
and overload
protection)
1. Check
Power voltage whether
is unstable, big power supply
fluctuation. network is
abnormal;
Power voltage
2. Reduce
is too low;
load;
overload.
3. Replace
Malfunction of outdoor unit's
hardware. main board
AP1
See 9.3
Refer to
(diagnosis of
maintenance
communication
flowchart
malfunction)
See
9.3(diagnosis
Refer to
of overheating
maintenance
prevention
flowchart
and overload
protection)
Installation and Maintenance