SiENBE04-925_A
Problem Symptoms and Measures
Service Diagnosis
71
2. Problem Symptoms and Measures
Symptom
Check Item
Details of Measure
Reference
Page
The units does not operate. 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 temperature.
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.
—
Diagnose with remote control
indication.
—
75
Check the remote control addresses. Check to make sure that address settings for
the remote control and indoor unit are correct.
—
Operation sometimes
stops.
Check the power supply.
A power failure of 2 to 10 cycles stops air
conditioner operation. (Operation lamp OFF)
—
Check the outdoor temperature.
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.
—
Diagnose with remote control
indication.
—
75
The unit operates but does
not cool, or does not heat.
Check for wiring and piping errors in
the connection between the indoor
and outdoor units.
Conduct the wiring/piping error check described
on the product diagnosis label.
—
Check for thermistor detection errors. Check to make sure that the thermistor is
mounted securely.
—
Check for faulty operation of the
electronic expansion valve.
Set the units to cooling operation, and check
the temperature of the liquid pipe to see if the
electronic expansion valve works.
—
Diagnose with remote control
indication.
—
75
Diagnose by service port pressure
and operating current.
Check for refrigerant shortage.
112
Large operating noise and
vibrations
Check the output voltage of the
power module.
—
123
Check the power module.
—
—
Check the installation condition.
Check to make sure that the required spaces
for installation (specified in the installation
manual, etc.) are provided.
—
SIENBE04-925_A_FRONT.pdf 86
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Summary of Contents for RXL25G2V1B
Page 8: ...SiENBE04 925_A vi Table of Contents ...
Page 14: ...Introduction SiENBE04 925_A xii ...
Page 15: ...SiENBE04 925_A List of Functions 1 Part 1 List of Functions 1 Functions 2 ...
Page 17: ...SiENBE04 925_A Specifications 3 Part 2 Specifications 1 Specifications 4 ...
Page 20: ...Specifications SiENBE04 925_A 6 Specifications ...
