Panasonic U-8ME1E8E Service Manual page 168

4. 2WAY Alarm Codes
P14 Alarm
Alarm code P14
Alarm meaning O sensor operation
2
(1) It is judged an error whenever the outdoor unit receives the signal "O
Alarm conditions
from the indoor unit.
(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
(2) Indoor EEPROM setting
2-1
(3) EXCT wiring
3-1
(4) Indoor control board
4-1 Is the alarm triggered if the EXCT socket (wire) is disconnected, and the power is reset?
4-2 Since there is no error, see what happens.
4-3 Indoor control board defective
Example —
Notes —
P16 Alarm
Alarm code P16
Alarm meaning Compressor 1 (INV) overcurrent alarm
Alarm conditions This alarm occurs when current trouble or current detection trouble occur (when trouble
judgment current is detected in the primary or secondary current, or when an instantaneous
secondary current of 18A* or higher is detected).
* Changed to output error by current regardless of the inverter frequency.
In addition, there are 6 horsepower and 10 horsepower compressors.
(1) When more than the over-current values shown in the table were detected in the primary
(2) When more than the current values shown in the table are instantly detected in the
Probable cause There is a strong possibility of a compressor failure.
An alarm occurs for current detection trouble when it is judged that no current is flowing after
start (DCCT is damaged). In this case, the cause is a DCCT failure.
Check Check the power wiring and connector wiring.
Correction It is possible to resolve this trouble by limiting the maximum frequency.
Example —
Notes —
Is an O sensor being used?
2
Is the EEPROM setting, item code 0B, on the indoor control board set to 0001?
Is the EXCT socket (wire) shorted?
and secondary current.
6 horsepower compressors
10 horsepower compressors
secondary current.
6 horsepower compressors
10 horsepower compressors
L1 L2 L3 N
Power terminal board
If "Yes", see "3-1".
If "No", see "2-1".
If "Yes", see "3-1" after modification.
If "No", see "4-1".
If "Yes", Modify the wiring.
If "No", see "4-1".
If "Yes", see "4-3".
If "No", see "4-2 ".
replace board
Primary Secondary
18A 18A
21A 21A
Secondary
28A
36A
Inverter compressor
6 - 25
2WAY SYSTEM
Trouble Diagnosis
Alarm Generated"
2
U
V
W
HIC PCB
6