Fisher FSFIF-121AE2, Service Manual

Page: 133 / 157

Troubleshooting
Electrical Control System 129
2.2 Indoor unit malfunction
For Console
Malfunction Timer Lamp
Operation Lamp
(flashes)
Indoor EEPROM malfunction X 1
Communication malfunction between indoor and outdoor units X 2
Indoor fan speed has been out of control X 4
Open or short circuit of T1 temperature sensor X 5
Open or short circuit of T2 temperature sensor X 6
Refrigerant leakage detection X 7
Overcurrent protection (For some units) O 1
Open or short circuit of T4 temperature sensor O 2
Open or short circuit of T3 temperature sensor O 3
Open or short circuit of T5 temperature sensor O 4
Outdoor EEPROM malfunction (For some units) O 5
Outdoor fan speed is out of control O 6
Open or short circuit of T2B temperature sensor (For free-match indoor units) O 7
IPM module malfunction ☆ 1
Over voltage or over low voltage protection ☆ 2
Too low ambient temperature protection
☆
4
Error rotor position protection of compressor
☆
5
Low pressure protection of compressor
☆
7
O (on) X(off)
☆
(flash at 2Hz)
For 12K compact cassette
Malfunction Error Code Timer Lamp
Operation Lamp
(flashes)
Indoor EEPROM malfunction E0 X 1
Communication malfunction between indoor and outdoor units E1 X 2
Indoor fan speed has been out of control E3 X 4
Open or short circuit of T1 temperature sensor E4 X 5
Open or short circuit of T2 temperature sensor E5 X 6
Refrigerant leakage detection EC X 7
Water level alarm EE X 8
Communication error between master and slave unit (for twins system) E8 X 9
Another indoor unit malfunction (for twins system) E9 X 10
Overcurrent protection (For some units) F0 O 1
Open or short circuit of T4 temperature sensor F1 O 2
Open or short circuit of T3 temperature sensor F2 O 3
Open or short circuit of T5 temperature sensor F3 O 4
Outdoor EEPROM malfunction (For some units) F4 O 5
Outdoor fan speed is out of control F5 O 6
Open or short circuit of T2B temperature sensor (For free-match indoor
units)
F6 O 7
IPM module malfunction P0 ☆ 1
Over voltage or over low voltage protection P1
☆
2
Too low ambient temperature protection P3
☆
4
Error rotor position protection of compressor P4
☆
5
Low pressure protection of compressor P6
☆
7
O (on) X(off)
☆
(flash at 2Hz)
FSFIF-121AE2
FSKIF-121AE2-EU