Daikin FTY25GXV1, Service Manual

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SiBE01-829 Problem Symptoms and Measures
Service Diagnosis 41
2. Problem Symptoms and Measures
Problem Check Solution 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 24°C or higher, and
cooling operation cannot be used when the
outdoor air temperature is below 10°C. —
Diagnosis with remote controller
indication — 43
Check the remote controller
addresses. Check to make sure that address settings for
the remote controller 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 24°C or higher, and
cooling operation cannot be used when the
outdoor air temperature is below 10°C. —
Diagnosis with remote controller
indication — 43
Equipment operates but
does not cool, or does not
heat. 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.
—
Diagnosis with remote controller
indication — 43
Large operating noise and
vibrations Check the output voltage of the
power transistor. — —
Check the power transistor. — —
Check the installation condition. Check to make sure that the required spaces
for installation (specified in the Engineering
Data Book, etc.) are provided. —