Panasonic U-4LE2E5 Service Manual & Test Run Service Manual page 147

3. Mini VRF Alarm Codes
P05 Alarm
Alarm code P05
Alarm meaning AC power supply has abnormal.
Alarm conditions AC power supply trouble.
Probable cause (1) Instantaneous blackout
(2) Zero-cross (waveform input of power supply) error
(3) DC voltage charge failure
Check (1) Check the power supply and power wiring.
(2) Check the wiring.
Check whether each wiring is missing or connector is damaged.
Correction (1) Correct the power supply and power wiring.
(2) Correct the wiring failure.
(3) Replace the Outdoor Unit Control PCB or the HIC PCB.
Example —
Notes —
P14 Alarm
Alarm code P14
Alarm meaning O sensor has activated.
2
Alarm conditions (1) It is judged an error whenever the outdoor unit receives the signal "O
the indoor unit.
(*) It is judged an error whenever the outdoor unit's EEPROM setting (item code C1) is made at other
than "0". See Section 1.
(2) With the indoor unit's EEPROM setting (item code 0B) set to 0001, the EXCT input was shorted.
Probable cause —
Check and (1) System configuration
Correction 1-1 Is an O
(2) Indoor EEPROM setting
2-1 Is the EEPROM setting, item code 0B, on the indoor control board set to 0001?
(3) Indoor control board
3-1 Is the alarm triggered if the EXCT socket (wire) is disconnected, and the power is reset?
3-2 Since there is no error, see what happens.
3-3 Indoor control board defective → replace board
Example —
Notes —
sensor being used?
2
6 - 19
Alarm Generated" from
2
If "Yes", see "3-1".
If "No", see "2-1".
If "Yes", change the setting of item code 0B to "0000"
from "0001".
If "No", see "3-1".
If "Yes", see "3-3".
If "No", see "3-2".
Mini VRF SYSTEM
Trouble Diagnosis
6