General Problem Symptoms And Check Items - Daikin CTX Series Service Manual

DAMA-SM-21-003

1. General Problem Symptoms and Check Items

Symptom
The unit does not operate.
Operation sometimes stops. Check the power supply.
The unit operates but does
not cool.
Large operating noise and
vibrations
Service Diagnosis
Check Item
Check the power supply.
Check the type of the indoor unit.
Check the outdoor temperature.
Diagnose with remote controller
indication
Check the remote controller
addresses.
Check the outdoor temperature.
Diagnose with remote controller
indication.
Check for wiring and piping errors in
the connection between the indoor
and outdoor units.
Check for thermistor detection errors.
Check for faulty operation of the
electronic expansion valve.
Diagnose with remote controller
indication.
Diagnose by service port pressure
and operating current.
Check the output voltage of the power
module.
Check the power module.
Check the installation condition.

General Problem Symptoms and Check Items

Details
Check if the rated voltage is supplied.
Check if the indoor unit type is compatible
with the outdoor unit.
Cooling operation is 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 can stop air
conditioner operation. (Operation lamp OFF)
Cooling operation is not available when the
outdoor temperature is out of the operation
limit. Check the reference page for the
operation limit.
—
—
Check if the thermistor is mounted securely.
Set the unit to cooling operation, and check
the temperatures 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.
Reference
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