Trouble Shooting - Pioneer KFDH075UW Technical Manual

Trouble Shooting

Trouble Shooting
In case of malfunction, perform the following preliminary check , before asking for repair service.
Problem
Unit cannot operate
Air flow too small
At Cooling Mode, no
cold air is delivered
Cooling , but not cold enough
Water discharge from
the unit
Cause
The power supply is turned OFF.
The fuse in the PCB is gone or blown.
Running at low (model 75/100)
Reverse rotation (model 125/150)
The set temperature is higher than room
temperature
The room temperature is excessively low for cooling
a Phase protector open (condensing unit)
b High pressure switch open
c Low pressure switch open
d comp overload protector open
The unit is just started the cooling mode
High infiltration through door, windows
Low refrigerant level
Air flow too high
Drain pipe is cloagged, water overflow
Trouble Shooting/ Remedy
Turn the power supply ON.
Replace fuse.
Switch to high mode
Swtich the phase for power line
Lower the set temperature.
Can not operate as it is out of temperature
control range.
refer to page 28
Check if any
i. air blockage on outdoor unit.
ii outdoor fan motor malfunction
iii. refrigernat overcharge.
iv. outdoor ambient above operating limit.
Check if any
i. refrigerant gas leakage
Check if any
i. refrigernat overcharge.
Wait for a while
Close the door ,windows
check suction, discharge pressure and temperature
Change fan speed
Clear the drain pipe