Daikin RKS25CVMB [114/246] Problem symptoms and measures

Daikin ARXS20CVMB [114/246] Problem symptoms and measures

SiENBE04-401A Problem Symptoms and Measures

Service Diagnosis 105

2. Problem Symptoms and Measures

Note: RK(X)S, ARK(X)S series ; –10°C

Symptom Check Item Details of Measure

Reference

Page

None of the Units

Operates.

Check the power supply. Check to make sure that the rated voltage is

supplied.

—

Check the type of the indoor units. Check to make sure that the indoor unit type is

compatible with the outdoor unit.

—

Check the outdoor air temperature. Heating operation cannot be used when the

outdoor air temperature is 21°C or higher (only

for heat pump model), and cooling operation

cannot be used when the outdoor air

temperature is below 10°C. (Note)

—

Diagnosis with remote control

indication

— 109

Check the remote control addresses. Check to make sure that address settings for

the remote control and indoor unit are correct.

—

Operation Sometimes

Stops.

Check the power supply. A power failure of 2 to 10 cycles can stop air

conditioner operation. (Operation lamp OFF)

—

Check the outdoor air temperature. Heating operation cannot be used when the

outdoor air temperature is 21°C or higher (only

for heat pump model), and cooling operation

cannot be used when the outdoor air

temperature is below 10°C. (Note)

—

Diagnosis with remote control

indication

— 109

Equipment operates but

does not cool, or does not

heat (only for heat pump

model).

Check for wiring and piping errors in

the indoor and outdoor units

connection wires and pipes.

Conduct the wiring/piping error check described

on the product diagnosis nameplate.

—

Check for thermistor detection errors. Check to make sure that the main unit’s

thermistor has not dismounted from the pipe

holder.

—

Check for faulty operation of the

electronic expansion valve.

Set the units to cooling operation, and compare

the temperatures of the liquid side connection

pipes of the connection section among rooms to

check the opening and closing operation of the

electronic expansion valves of the individual

units.

—

Diagnosis with remote control

indication

— 109

Diagnosis by service port pressure

and operating current

Check for insufficient gas. 143

Large Operating Noise and

Vibrations

Check the output voltage of the

power transistor.

— 144

Check the power transistor. — —

Check the installation condition. Check to make sure that the required spaces

for installation (specified in the Technical

Guide, etc.) are provided.

—

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