64
MAINTENANCE
ƹ
Malfunction display: F3 Failure of Outdoor Ambient Sensor
Check if the plug of the temperature sensor is
correctly connected with socket on the mainboard
Failure of outdoor Ambient
sensor
N
Remove the sensor to check if the resistance
value is ok
N
Y
Y
Y
Replace mainboard of the
indoor uint
Check the direction of
the plug and socket
Replace temperature sensor
ƹ
Malfunction display: F5 Failure of Exhaust Temp. Sensor
Check if the plug of the temperature sensor is
correctly connected with socket on the mainboard
Failure of Exhaust Temp.
sensor
N
Remove the sensor to check if the resistance
value is ok
N
Y
Y
Y
Replace mainboard of the
indoor uint
Check the direction of
the plug and socket
Replace temperature sensor
Summary of Contents for MUL12- FWCA
Page 1: ...Service Manual MODEL MUL FWCA Series...
Page 4: ...1 PRODUCT...
Page 11: ...11 CONTROL CONTROL...
Page 30: ...54 MAINTENANCE...
Page 41: ...66 MAINTENANCE 3 2 Indoor unit 3 2 2 Cassette type MUL12 FWCA MUL18 FWCA MUL24FWCA...
Page 44: ...91 MAINTENANCE 5 2 2 Cassette type MUL12 FWCA...
Page 46: ...93 MAINTENANCE MUL18 FWCA...
Page 48: ...95 MAINTENANCE MUL24 FWCA...