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