Panasonic U-4LE1E5 Service Manual page 132

4. Mini VRF System Alarm Codes
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 unit's
3-1
control
PC board
3-2
3-3 Indoor unit control PC board error
5
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 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.
5 - 44
Mini VRF SYSTEM
Mini VRF SYSTEM
Trouble Diagnosis
Trouble Diagnosis
Yes 3-1
No 2-1
Change the setting
Yes of item code 0B to
"0000" from "0001".
No 3-1
Yes 3-3
No 3-2