Panasonic S-22ML1E5, Руководство по обслуживанию и руководство по проведению испытательных запусков

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Mini VRF SYSTEM
Trouble Diagnosis
6
3. Mini VRF Alarm Codes
2WAY VRF SYSTEM
Trouble Diagnosis
3. 2WAY Alarm Codes
P14 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check and
Correction
Example
Notes
P14
O
2
sensor operation
(1)
1-1 Is an O
2
sensor being used?
System configuration
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”.
(2)
2-1 Is the EEPROM setting, item code 0B, on the indoor control board set to 0001?
Indoor EEPROM setting
(3)
3-1 Is the alarm triggered if the EXCT socket (wire) is disconnected, and the power is reset?
Indoor control board
3-2 Since there is no error, see what happens.
3-3 Indoor control board defective
replace board
—
—
(1)
(2)
It is judged an error whenever the outdoor unit receives the signal “O
2
Alarm Generated” from 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.
With the indoor unit's EEPROM setting (item code 0B) set to 0001, the EXCT input was shorted.
—
P16 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
P16
Compressor secondary current is overcurrent.
This alarm occurs when current trouble or current detection trouble occur
(when trouble judgement current is detected in the secondary current).
*
When more than the current values shown in the table are instantly
detected in the secondary current.
Changed to output error by current regardless of the inverter frequency.
(1) Power supply voltage malfunction
(2) Wiring failure (connection failure, miswiring)
* Wiring between HIC PCB and compressor
(1) Check the power supply voltage.
Check whether the voltage between each of the phases is correct while the compressor is running.
(It is necessary to check the compressor while running because the voltage may decrease when the
compressor starts running.)
(2) Check the wiring.
Check whether the following wiring is missing, connection failure or miswiring (position of U, V, W is
properly placed).
・ Wiring between HIC PCB and compressor
・ HIC PCB side
・ Compressor side
(1) Correct the power supply voltage.
(2) Correct the wiring.
(3) Replace the compressor or the HIC PCB.
—
When replacing HIC PCB, be sure to attach next radiating putty between the PCB and heatsink.
Model name
Secondary current
Current (A)
U-4LE2E5 U-5LE2E5
24.5
U-6LE2E5
Model name
Current (A)
U-4LE2E8 U-5LE2E8
15.2
U-6LE2E8
Inverter compressor
HIC PCB
Secondary
current
P29 Alarm
Alarm code P29
Alarm meaning Compressor start failure. Compressor is missing phase or reverse phase.
Alarm conditions This alarm may occur at start, and occurs when open phase or lock alarm is detected or the
compressor is in reversed-phase, and when a DCCT failure occurs.
Probable cause (1) Power supply voltage malfunction
(2) Wiring failure (missing, connection failure, miswiring, reversed-phase)
* Wiring between the HIC PCB and compressor
Check (1) Check the power supply and voltage.
Check whether the voltage between each of the phases is correct while the compressor is
running.
(It is necessary to check the compressor while running because the voltage may decrease
when the compressor starts running.)
(2) Check the wiring.
Check whether the following wiring is missing, connection failure or miswiring (position of U, V,
W is properly placed).
• Wiring between the HIC PCB and compressor
• HIC PCB side
• Compressor side
Correction (1) Correct the power supply voltage.
(2) Correct the wiring.
(3) Replace the HIC PCB.
(4) Replace the compressor.
Example —
P22 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
P22
Outdoor unit fan motor has failure.
Fan motor start failure, fan motor Hall IC input failure
(1) Wiring failure
(2) Outdoor Unit Control PCB failure
(3) Fan failure
(4) Fan motor failure
Check (1) Wiring check
1-1 Are the connctors "CN-FM" firmly connected to the Outdoor Unit Control PCB
(lock engaged)?
If “Yes”, see “2-1”.
If “No”, correct the connector connections.
(2) Outdoor fan motor check
2-1 Disconnect the connectors "CN-FM" from the Outdoor Unit Control PCB and rotate the
outdoor fan by hand ; does it rotate freely?
(Check the outdoor fan motor lock)
If “Yes”, see “3-1”.
If “No”, replace the outdoor fan motor.
(3) Outdoor control PC board check
3-1 Turn the power on and run the unit again; is P22 triggered again? Or can you see or
hear anything that is obviously wrong in its rotation?
If “Yes”, see “3-2”.
If “No”, see “3-3”.
3-2 Replace the Outdoor Unit Control PCB.
3-3 If there is nothing particularly out of the ordinary, see what happens.
Correction
Example
Notes
(1) Correct the wiring.
(2) Remove the obstacles attached to the fan.
(3) Replace the fan motor.
(4) Replace the Outdoor Unit Control PCB.
—
Turn OFF the power, and check the continuity of “+” and “–” on the Outdoor Unit Control PCB.
P20 Alarm
Alarm code P20
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
Too high load in refrigerant circuit.
The high pressure increase is not rapid but the alarm occurs when the horsepower down does
not meet the anticipated time.
(1) Forgot to open the valve.
(2) Operation failure of mechanical valve
(3) Idle away of outdoor fan
Check the valve, mechanical valve and outdoor fan.
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SM830258-01_欧州向け_1fan_mini_VRF.indb 21 18/03/13 17:29:25