Problem Symptoms And Measures - Daikin FLKS25BAVMB Service Manual

Problem Symptoms and Measures

2. Problem Symptoms and Measures

Symptom
The units does not operate. Check the power supply.
Operation sometimes
stops.
The unit operates but does
not cool, or does not heat.
Large operating noise and
vibrations
64
Check Item
Check the type of the indoor units.
Check the outdoor temperature.
Diagnose with remote control
indication.
Check the remote control addresses. Check to make sure that address settings for
Check the power supply.
Check the outdoor temperature.
Diagnose with remote control
indication.
Check for wiring and piping errors in
the connection between the indoor
and outdoor units.
Check for thermistor detection errors. Check to make sure that the thermistor is
Check for faulty operation of the
electronic expansion valve.
Diagnose with remote control
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.
Details of Measure
Check to make sure that the rated voltage is
supplied.
Check to make sure that the indoor unit type is
compatible with the outdoor unit.
Heating operation cannot be used when the
outdoor temperature is 20°C or higher, and
cooling operation cannot be used when the
outdoor temperature is below –10°C.
—
the remote control and indoor unit are correct.
A power failure of 2 to 10 cycles stops air
conditioner operation. (Operation lamp OFF)
Heating operation cannot be used when the
outdoor temperature is 20°C or higher, and
cooling operation cannot be used when the
outdoor temperature is below –10°C.
—
Conduct the wiring / piping error check
described on the product diagnosis label.
mounted securely.
Set the units to cooling operation, and check
the temperature of the liquid pipe to see if the
electronic expansion valve works.
—
Check for refrigerant shortage.
—
—
Check to make sure that the required spaces
for installation (specified in the installation
manual, etc.) are provided.
SiENBE05-722_A
Reference
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Service Diagnosis