General Problem Symptoms And Check Items - Daikin FTX-N Series Service Manual

SiUS091601EA

1. General Problem Symptoms and Check Items

Symptom
The unit does not Check the power supply.
operate.
Check the type of the indoor unit.
Check the outdoor temperature.
Diagnose with remote controller
indication.
Check the remote controller
addresses.
Operation sometimes Check the power supply.
stops.
Check the outdoor temperature.
Diagnose with remote controller
indication.
The unit operates but Check for wiring and piping errors in
does not cool, or does the connection between the indoor
not heat. unit and outdoor unit.
Check for thermistor detection errors. Check if the thermistor is mounted securely.
Check for faulty operation of the
electronic expansion valve.
Diagnose with remote controller
indication.
Diagnose by service port pressure
and operating current.
Large operating noise Check the output voltage of the power
and vibrations module.
Check the power module.
Check the installation condition.
Part 6 Service Diagnosis
Check Item
Check if the rated voltage is supplied.
Check if the indoor unit type is compatible with the
outdoor unit.
Heating/cooling operations are not available when
the outdoor temperature is out of the operation
limit. Check the reference page for the operation
limit.
Check if address settings for the remote controller
and indoor unit are correct.
A power failure of 2 to 10 cycles stops air
conditioner operation. (Operation lamp OFF)
Heating/cooling operations are not available when
the outdoor temperature is out of the operation
limit. Check the reference page for the operation
limit.
Set the unit to cooling operation, and check the
temperature of the liquid pipe to see if the
electronic expansion valve works.
Check for refrigerant shortage.
Check if the required spaces for installation
(specified in the installation manual) are provided.

General Problem Symptoms and Check Items

Measures
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Reference
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