Lennox LNINVE052 Service Manual page 62

Service Manual
malfunction
28 of read EE
EEPROM
Charging
29 malfunction PU
of capacitor
Circuit
malfunction
30 of module P7
temperature
sensor
Module
31 temperature P8
protection
Installation and Maintenance
Flash
15 times
□ □ □
every 3s
Flash
17 times
□ ■ □
every 3s
Flash
18 times
□ □ ■
every 3s
Flash
19 times
■ □ ☆
every 3s
Wrong match
During cooling
between indoor
and drying
unit and outdoor
operation,
unit;
compressor and
outdoor fan stop
Hardware
■
while indoor
malfunction of
fan operates.
indoor unit's main
During heating
board;
operation, all
Hardware
loads stop.
malfunction of
outdoor unit's
main board;
During cooling
and drying
operation,
See 9.3
compressor and
(diagnosis
outdoor fan stop
of charging
■
while indoor
malfunction for
fan operates.
capacitor)
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.
Radiating grease
During cooling
on IPM module
and drying
of outdoor unit's
operation,
main board is not
compressor and
enough; screws
outdoor fan stop
■ haven't been
while indoor
fixed tightly;
fan operates.
During heating
operation, all
loads stop.
Hardware
malfunction of
outdoor unit's
main board;
1. Check whether
the capacity of
indoor unit and
outdoor unit is
matching with
each other;
2. Replace indoor
unit's main board
AP2;
3. Replace
outdoor unit's
main board AP1;
Refer to
maintenance
flowchart
1. Replace
outdoor unit's
main board AP1;
1. After the
system is de-
energized for
20min and
discharge,
check whether
radiating grease
on IPM Module
of outdoor
control board
AP1 is enough
and whether the
radiating is fixed
tightly;
2. Replace
outdoor unit's
main board AP1;
59