Daikin REMQ14PY1 [402/491] Incl u ding f au lty c a p a city s etting

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Refrigerant accumulation
Overcharge of refrigerant
Faulty crankcase heater
Frequent ON/OFF of compressor
[Cooling]
Indoor unit
motorized valve
opens too
much. (*1)
[Heating]
Outdoor unit
motorized valve
opens too
much. (*2)
Faulty control
of superheated
degree
Faulty indoor
unit motorized
valve
Faulty outdoor
unit motorized
valve
Faulty control
Faulty control
Refer to information in the [Check 6]
section.
Does the valve coil have normal
resistance and insulation?
(Refer to information in the [Check 11]
section.)
Is the connector correctly connected?
Are the thermistor resistance
characteristics normal?
Is the connector correctly connected?
Are the thermistor resistance
characteristics normal?
Does the valve coil have normal
resistance and in
sulation?
(Refer to information in the [Check 11]
section.)
Are the voltage characteristics normal?
Is the connector correctly connected?
Does the thermistor have normal
resistance characteristics?
Is the pressure reading of the service
checker corresponding to the actual
measurement of the sensor?
Can the fan motor be rotated by
hand?
Does the fan motor coil have
normal res
istance and
insulation?
Does the air filter get clogged?
Are there any obstacles in the air
passage?
Degraded
evaporation
capacity
Increased
resistance
in air
passage
Dirty evaporator
Reduced
air quantity
Reduced
fan output
*1: "Superheated degree control" in cooling operation is exercised with the indoor unit motorized valve. (Refer to
information on P141.)
*2: "Superheated degree control" in heating operation is exercised with the outdoor unit motorized valve (EV1).
(Refer to information on P108.)
*3: Guideline of superheated degree to judge as wet operation
1
Suction gas superheated degree: Not more than 3°C;
2
Discharge gas superheated degree: Not more than
15°C, except immediately after compressor starts up or is running
under drooping control.
(Use the values shown above as a guideline. Even if the superheated degree falls in the range, the compressor
may be normal depending on other conditions.)
Faulty valve coil
Faulty valve body
Faulty indoor unit
gas pipe thermistor
Faulty indoor unit
liquid pipe thermistor
Faulty control PC board
Faulty valve coil
Faulty valve body
Faulty power pressure sensor
Faulty suction pipe thermistor
Faulty control PC board
Does the heat exchanger get clogged?
Faulty fan motor
Faulty control PC board
(including faulty
capacity setting)
Dirty filter
Obstacles
Wet operation

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