Lennox LNINVE052 Service Manual page 60

Service Manual
Overcurrent
20 protection of P5
phase current
21 Defrosting
Overload
22 protection of H3
compressor
IPM
23 H5
protection
Installation and Maintenance
Flash
15 times
□
every 3s
ON 10s
and OFF
0.5s
Flash
3 times
□
every 3s
Flash
5 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.
See 9.3
(diagnosis of
IPM protection,
desynchronizing Refer to
malfunction, maintenance
overcurrent flowchart
protection of
phase current of
compressor)
Normal function
1:Wiring
terminal OVC-
COMP is loose 1. After de-
(Under normal energization,
circumstances, insert OVC-
the resistance COMP terminal
between both tightly;
ends of this
terminal should
be less than 1Ω.)
2: See 9.3
(diagnosis of 2. Refer to
overload and maintenance
discharge flowchart
protection)
See 9.3
(diagnosis of
IPM protection,
desynchronizing Refer to
malfunction, maintenance
overcurrent flowchart
protection of
phase current of
compressor)
57