Daikin FCQ35B7V1 Service Manual page 250

Test Run and Operation Data
1
Correlation of
Air-Conditioner's
Operation Status
and Pressure /
Running Current
3
4
5
Notes:
4–26
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
Air-Conditioner Status
Air Filter Fouling
Short Circuit of Indoor Unit
Inlet/Outlet Air
Outdoor Unit Fin Fouling
Short Circuit of Outdoor Unit
Inlet/Outlet Air
Air Mixed in Refrigerant
Water Mixed in Refrigerant
Dirt Mixed in Refrigerant
Lack of Refrigerant (Gas)
Unsatisfactory Compression
When Heating
Air-Conditioner Status
Air Filter Fouling
Short Circuit of Indoor Unit
Inlet/Outlet Air
Outdoor Unit Fin Fouling
Short Circuit of Outdoor Unit
Inlet/Outlet Air
Air Mixed in Refrigerant
Water Mixed in Refrigerant
Dirt Mixed in Refrigerant
Lack of Refrigerant (Gas)
Unsatisfactory Compression
∗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 low.
Low Pressure High Pressure
Lower Lower
Lower Lower
Higher Higher
Higher Higher
Higher Higher
∗1 Lower
Lower
∗2 Lower
Lower
Lower Lower
∗3 Higher
Lower
Low Pressure High Pressure
Higher Higher
Higher Higher
Lower Lower
Lower Lower
Higher Higher
∗1 Lower
Lower
∗2 Lower
Lower
Lower Lower
∗3 Higher
Lower
Part 4 – Commissioning and Test Run
ESIE05-04
Running Current
Lower
Lower
Higher
Higher
Higher
Lower
Lower
Lower
Lower
Running Current
Higher
Higher
Lower
Lower
Higher
Lower
Lower
Lower
Lower