Daikin RY50G - Page 89

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Maintenance Inspections Si-71A

78 Troubleshooting

Correlation of Air-

Conditioner’s

Operation Status

and Pressure /

Running Current

What happens in comparison to normal values is summarized in the table below.

(Measured from 15 ~ 20 minutes or more after operation starts.)

When Cooling

When Heating

Note:

∗

1. Water in the refrigerant freezes inside the capillary tube or expansion valve, and is basically the

same phenomenon as pump down.

∗

2. Dirt in the refrigerant clogs filters inside the piping, and is basically the same phenomenon as pump

down.

∗

3.Pressure differential between high and low pressure becomes slight.

Air-Conditioner Status Low Pressure High Pressure Running Current

Air Filter Fouling Lower Lower Lower

Short Circuit of Indoor Unit Inlet/Outlet

Air

Lower Lower Lower

Outdoor Unit Fin Fouling Higher Higher Higher

Short Circuit of Outdoor Unit Inlet/Outlet

Air

Higher Higher Higher

Air Mixed in Refrigerant Higher Higher Higher

Water Mixed in Refrigerant

∗

1 Lower Lower Lower

Dirt Mixed in Refrigerant

∗

2 Lower Lower Lower

Lack of Refrigerant (Gas) Lower Lower Lower

Unsatisfactory Compression

∗

1 Higher Lower Lower

Air-Conditioner Status Low Pressure High Pressure Running Current

Air Filter Fouling Higher Higher Higher