Panasonic 2WAY Multi - P15 Complete Refrigerant Gas Depletion

IV–93
P15 Complete Refrigerant Gas Depletion
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Error detection method
• Engine startup is delayed when compressor inlet pressure ≤0.1 Mpa. A delay that lasts 10 minutes is counted
as a fault.
• During engine operation (complete combustion) when (compressor inlet pressure ≤ 0.1 MPa) or (outdoor
heat exchanger outlet temperature - saturation temperature) ≥ 30deg) *1 continues for 3 minutes, the engine
is stopped and an error fl ag is set. A Refrigerant Gas Completely Absent fault is assumed when this fl ag has
shut down the engine 5 consecutive times.
*1 Only during cooling (heat exchange outlet temperature is the outdoor heat exchanger outlet during cooling)
• Not detected for 7 minutes from complete combustion. If the compressor inlet pressure ≤ 0.01 MPa for a 3
minute interval, an error will be detected even within seven minutes of complete combustion.
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Troubleshooting
1
Check
pressure
sensor
1-1
Install a gauge on a large tube and small tube service port,
open the valve (open valve using outdoor main board No.
4 trial operation forced setting) to equalize pressure in the
refrigerant circuit. The values on the outdoor main board
display and the gauge should be roughly identical. Is it 0.1
MPa or less?
Yes 3-1
No 2-1
2
Check
wiring
2-1 Check compressor inlet pressure sensor wiring. OK?
Yes
Replace pressure
sensor
No Repair wiring
3
Check
compressor
relief valve
3-1
Check the compressor relief valve. Are there any leaks or
signs of leaks?
Yes
Repair leak and charge
gas.
No 3-2
3-2 Is the tubing clogged?
Yes
Unclog tubing Charge
gas.
No 3-3
3-3 Are there any other places with leakage?
Yes
Repair leak and charge
gas.
No Replace compressor
● For board and Electrical Wiring Diagram, see Chapter 6.
• Outdoor main board: page VI-2
• Outdoor power board: page VI-3
• Converter board: VI-4
• Indoor control board for DC motor models: page VI-5
• Outdoor Unit Electrical Wiring Diagram: page VI-6
● 1-1
Use outdoor main board menu item No. 04 to open valve using trial operation/forced settings. Press the SET
key, the LED lights as the valve opens. Press the key again to turn off the TEST/WARNING LED and close
the valve.
● 2-1
Outdoor main board
Red
Red
Brown
Black
Pressure sensor
3P-3(Black)
3
1
GHPtroubleshooting.indbIV‒93GHPtroubleshooting.indbIV‒93 2012/11/2611:20:142012/11/2611:20:14