Panasonic U-4LE1R8 Service Manual page 84

3. Mini VRF System Alarm Codes
P14 O Sensor
2
1. Error Detection Method
• It is judged an error whenever the outdoor unit receives the signal "O
• With the indoor unit's EEPROM setting (item code 0B) set to 0001, the EXCT input was shorted.
2. Error Diagnosis
1 System
1-1
configuration
2 Indoor unit's
EEPROM
2-1
setting
3 Indoor EXCT
3-1
wiring
4 Indoor unit's
4-1
control
PC board
4-2
4-3 Indoor unit control PC board error
3
Is an O sensor being used?
2
Is the indoor EEPROM setting, item code 0B, on the indoor unit's
control PC board set to 0001?
Is the indoor EXCT socket (wire) shorted?
Is the alarm triggered if the indoor EXCT socket (wire) is
disconnected, and the power is reset?
Since there is no error, see what happens.
Alarm Occurred" from the indoor unit.
2
replace PC board.
3-44
Mini VRF SYSTEM
Trouble Diagnosis
Yes 3-1
No 2-1
After correcting the
Yes
setting, 3-1
No 4-1
Yes Correct wiring
No 4-1
Yes 4-3
No 4-2