Problem Symptoms And Measures - Daikin FVKS25BVMB Service Manual

Si06-305
2.

Problem Symptoms and Measures

Problem Symptom
None of the Units
Operates.
Operation Sometimes
Stops.
Some indoor units do not
operate.
Equipment operates but
does not cool, or does not
heat (only for heat pump
model).
Large Operating Noise and
Vibrations
Service Diagnosis
Check Item
Check the power supply.
Check the type of the indoor units. Check to make sure that the indoor unit type is
Check the outdoor air temperature. Heating operation cannot be used when the
Diagnosis with code indication on
the remote controller
Check the remote controller
addresses.
Check the power supply.
Check the outdoor air temperature. Heating operation cannot be used when the
Diagnosis with code indication on
the remote controller
Check the type of the indoor units. Check to make sure that the indoor unit type is
Diagnosis with code indication on
the remote controller
Check for thermistor detection
errors.
Diagnosis with code indication on
the remote controller
Diagnosis by service port pressure
and operating current
Check the power transistor.
Check the installation condition.

Problem Symptoms and Measures

Details of Measure
Check to make sure that the rated voltage is
supplied.
compatible with the outdoor unit.
outdoor air temperature is 30°C or higher (only
for heat pump model), and cooling operation
cannot be used when the outdoor air
temperature is below –10 °C.
—
Check to make sure that 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)
outdoor air temperature is 30°C or higher (only
for heat pump model), and cooling operation
cannot be used when the outdoor air
temperature is below –10°C.
—
compatible with the outdoor unit.
—
Check to make sure that the main unit's
thermistor has not dismounted from the pipe
holder.
—
Check for insufficient gas.
—
Check to make sure that the required spaces
for installation (specified in the Installation
Manual, etc.) are provided.
Reference
Page
—
—
—
73
—
—
—
73
—
73
—
73
99
—
—
71