P13 Refrigerant Circuit Error (3Way - Panasonic 2WAY Multi Technical & Service Manual

P13 Refrigerant Circuit Error (3WAY)

Error detection method
• The indoor unit outputs this warning when it determines that a compressor, outdoor solenoid valves, system
refrigerant should be inspected.
• For detailed inspection procedure, see P13 Refrigerant Circuit Fault (W MULTI).
• The system stops and there is no automatic reset when this warning is output.
Troubleshooting
1
Pressure For adjustment of the pressure sensor, see (adjustment
1-1
sensor procedure section F16).
inspection
2 Use the No. 4 test mode "v_open" (valve open) to equalize the
Inspect pressure to assess whether amount of refrigerant is extremely
system low when it is lower in pressure than saturated pressure
2-1
refrigerant at ambient temperature. (Assessed as out of gas when
extremely low)
Out of refrigerant gas?
3 3-1 Turn off the outdoor unit (be sure to do this before work)
Inspect the
Use the instructions in P26 Clutch Connection Fault, to adjust
compressor. 3-2
operation and wiring of clutch 1 and 2. Any problems?
4
Inspect Replace the compressor and check the refrigerant oil in the
4-1
refrigerant replaced compressor for contamination.
oil.
5
Replace After replacing the compressor, perform a trial operation and check the equipment. Check
5-1
compressor completed if OK.
(1)
6
Replace
6-1 Perform a fl ashing cleaning to clean the inside of the refrigerant tubes.
compressor
(2)
7 Adjust outdoor solenoid valves. Use trial operation mode
Inspect to check that the solenoid valves operate normally in
outdoor each operating mode (cooling/heating) and measure
solenoid tube temperature around solenoid valves to assess. (For
7-1
valves information on solenoid valve operation in each operating
mode, see the sections Control functions - Operating control
in the "Outdoor unit manual."
Does the solenoid valve operate normally?
Adjust the power board.
7-2 Does the power board CN013 output the solenoid power
supply voltage (AC 200V)?
Any poor connection and broken wires in wiring between the
7-3
power board and the relay board?
Adjust the outdoor main board.
In No. 4 test mode when "v_open" (valve open), is there a
drive output voltage (DC 12V) from discharge valves 1-1, 1-2,
discharge valve 2, suction valve 2-1 and 2-2?
(9P (white) CN018)
Discharge valve 1-1, 1-2: between No. 3 - 9 Discharge valve 2:
7-4 between No. 4-9
Suction valve 2-1, 2-2: between No. 6 - 9
Does suction valve 1 output a drive voltage (DC 12V) during
cooling operation?
Suction valve 1: between No. 3 - 9
* Note that suction valve 1 closes when powered (the other
valves operate in the opposite way)
IV–91
OK 2-1
NG Repair
Check for refrigerant
Yes
leaks and repair.
No 3-1
Yes 4-1
No 7-1
Not contaminated 5-1
Contaminated 6-1
Replace outdoor main
Yes
board
No 7-2
Yes 7-3
Yes Repair wiring
No 7-4
Yes 7-5
Replace outdoor main
No
board