P14 Alarm; P16 Alarm - Panasonic U-8ME1E81 Service Manual

4. 2WAY Alarm Codes
4. 2WAY Alarm Codes

P14 Alarm

Alarm code
Alarm meaning
P14 Alarm
Alarm conditions
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check and
Correction
Probable cause
Check and
Correction
Example
Example
1
Notes
Notes

P16 Alarm

P16 Alarm
Alarm code
Alarm code
Alarm meaning
Alarm meaning
Alarm conditions
2
Alarm conditions
3
Probable cause
4
Check
Correction
Example
5
Notes
6
Probable cause
Check
Correction
7
Example
Notes
8
P14
O sensor operation
2
(1) It is judged an error whenever the outdoor unit receives the signal "O
P14 from the indoor unit.
(2) With the indoor unit's EEPROM setting (item code 0B) set to 0001, the EXCT input was
O sensor operation
2
shorted.
(1) It is judged an error whenever the outdoor unit receives the signal "O
—
from the indoor unit.
(1) System configuration
(2) With the indoor unit's EEPROM setting (item code 0B) set to 0001, the EXCT input was
shorted.
1-1 Is an O sensor being used?
2
—
(1) (2) System configuration Indoor EEPROM setting
2-1 Is the EEPROM setting, item code 0B, on the indoor control board set to 0001?
1-1 Is an O sensor being used?
2
(2) Indoor EEPROM setting
2-1 Is the EEPROM setting, item code 0B, on the indoor control board set to 0001?
(3) EXCT wiring
3-1 Is the EXCT socket (wire) shorted?
(4)Indoor control board
(3) Indoor control board
4-1 Is the alarm triggered if the EXCT socket (wire) is disconnected, and the power is reset?
3-1 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.
3-2 Since there is no error, see what happens.
4-3 Indoor control board defective
3-3 Indoor control board defective
—
—
—
—
P16
P16
Compressor 1 (INV) overcurrent alarm
Compressor 1 (INV) overcurrent alarm
This alarm occurs when current trouble or current detection
This alarm occurs when current trouble or current detection trouble occur (when trouble
trouble occur (when trouble judgement current is detected
judgement current is detected in the primary or secondary current, or when an instantaneous
secondary current of 18A* or higher is detected).
in the secondary current).
* Changed to output error by current regardless of the inverter frequency.
* Changed to output error by current regardless of the inverter
In addition, there are 6 horsepower and 10 horsepower compressors.
frequency.
(1) When more than the over-current values shown in the table were detected in the primary
and secondary current.
When more than the current values shown in the table are
instantly detected in the secondary current.
6 horsepower compressors
Secondary current
10 horsepower compressors
Horsepower of unit 8HP
(2) When more than the current values shown in the table are instantly detected in the
Current (A) 19.6
secondary current.
There is a strong possibility of a compressor failure.
6 horsepower compressors
An alarm occurs for current detection trouble when it is judged that no current is flowing after
10 horsepower compressors
start (DCCT is damaged). In this case, the cause is a DCCT failure.
Check the power wiring and connector wiring.
It is possible to resolve this trouble by limiting the maximum frequency.
—
—
L1 L2 L3 N
Power terminal board
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 the power wiring and connector wiring.
It is possible to resolve this trouble by limiting the maximum frequency.
—
—
If "Yes", see "3-1".
If "No", see "2-1".
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 "Yes", change the setting of item code 0B
If "No", see "4-1".
to "0000" from "0001".
If "No", see "3-1".
If "Yes", see "4-3".
If "Yes", see "3-3".
If "No", see "4-2 ".
If "No", see "3-2".
replace board
replace board
Primary Secondary
18A 18A
21A 21A
10HP 12HP 14HP 16HP
21.8 17.6 21.0 22.5
Secondary
28A
36A
Inverter compressor
3-26
2WAY SYSTEM
Trouble Diagnosis
Trouble Diagnosis
Alarm Generated"
2
Alarm Generated"
2
HIC PCB
18HP 20HP Inverter compressor
21.0 21.0
U
V
W
HIC PCB
2WAY SYSTEM
U
V
W