53
Installation and Maintenance
Service Manual
27
malfunction
of read
EEPROM
EE
□
□
□
■
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;
28
Charging
malfunction
of capacitor
PU
□
■
□
■
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
29
Circuit
malfunction
of module
temperature
sensor
P7
□
□
■
☆
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;
30
Module
temperature
protection
P8
■
□
☆
■
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;
