68
Installation and Maintenance
Service Manual
30
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 units main
board;
2. Replace indoor units
main board AP2;
Hardware malfunction
of outdoor units main
board;
3. Replace outdoor
units main board AP1;
31
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
32
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 units main
board;
1. Replace outdoor
units main board AP1;
33
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
units main board is not
enough; screws havent
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 units main
board;
2. Replace outdoor
units main board AP1;
