Problem Symptoms And Measures - Daikin CTXS09GVJU Service Manual

Problem Symptoms and Measures

2. Problem Symptoms and Measures

Problem Symptom
None of the units operates. Check the power supply.
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
106
Check Item
Check the type of the indoor units.
Check the outdoor air temperature.
Diagnosis with indoor unit LED
remote controller indicator codes
Diagnosis with outdoor unit LED
remote controller indicator codes
Check the remote controller
addresses.
Check the power supply.
Check the outdoor air temperature.
Diagnosis with indoor unit LED
remote controller indicator codes
Diagnosis with outdoor unit LED
remote controller indicator codes
Check the type of the indoor units.
Diagnosis with indoor unit LED
remote controller indicator codes
Diagnosis with outdoor unit LED
remote controller indicator codes
Check for wiring and piping errors in
the indoor and outdoor units
connection wires and pipes.
Check for thermistor detection errors. Check to make sure that the main unit's
Check for faulty operation of the
electronic expansion valve.
Diagnosis with indoor unit LED
remote controller indicator codes
Diagnosis with outdoor unit LED
remote controller indicator codes
Check Inverter Units Refrigerant
System
Check the capacitor voltage.
Check the power transistor.
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 air temperature is 75.2°F or higher
(only for heat pump model), and cooling
operation cannot be used when the outdoor air
temperature is below 14°F.
—
—
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)
Heating operation cannot be used when the
outdoor air temperature is 75.2°F or higher
(only for heat pump model), and cooling
operation cannot be used when the outdoor air
temperature is below 14°F.
—
—
Check to make sure that the indoor unit type is
compatible with the outdoor unit.
—
—
Conduct the wiring/piping error check described
on the product diagnosis nameplate.
thermistor has not dismounted from the pipe
holder.
Set the units to cooling operation, and compare
the temperatures of the liquid side connection
pipes of the connection section among rooms to
check the opening and closing operation of the
electronic expansion valves of the individual
units.
—
—
Check for insufficient gas.
—
—
Check to make sure that the required spaces
for installation (specified in the Engineering
Data Book, etc.) are provided.
SiUS12-814
Page
No.
to be
referred
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—
—
111
112
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—
—
111
112
—
111
112
—
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—
111
112
164
165
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Service Diagnosis