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General Problem Symptoms and Check Items
SiUS091601E
61
Service Diagnosis
1. General Problem Symptoms and Check Items
Symptom
Check Item
Details
Reference
Page
The unit does not operate.
Check the power supply.
Check if the rated voltage is supplied.
—
Check the type of the indoor unit.
Check if the indoor unit type is compatible with the
outdoor unit.
—
Check the outdoor temperature.
Heating operation is not available when the outdoor
temperature is -25°CWB (-13°FWB) or higher, and
cooling operation is not available when the outdoor
temperature is below 10°CDB (50°FDB).
—
Diagnose with remote controller
indication.
—
69
Check the remote controller
addresses.
Check if address settings for the remote controller
and indoor unit are correct.
119
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 is not available when the outdoor
temperature is -25°CWB (-13°FWB) or higher, and
cooling operation is not available when the outdoor
temperature is below 10°CDB (50°FDB).
—
Diagnose with remote controller
indication.
—
69
The unit operates but does
not cool, or does not heat.
Check for wiring and piping errors in
the connection between the indoor
unit and outdoor unit.
—
—
Check for thermistor detection errors. Check if the thermistor is mounted securely.
—
Check for faulty operation of the
electronic expansion valve.
Set the unit to cooling operation, and check the
temperature of the liquid pipe to see if the electronic
expansion valve works.
—
Diagnose with remote controller
indication.
—
69
Diagnose by service port pressure
and operating current.
Check for refrigerant shortage.
—
Large operating noise and
vibrations
Check the output voltage of the
power module.
—
111
Check the power module.
—
—
Check the installation condition.
Check if the required spaces for installation
(specified in the installation manual) are provided.
—
Summary of Contents for FTX09NMVJU
Page 12: ...SiUS091601E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 15: ...SiUS091601E Specifications 4 Part 2 Specifications 1 Specifications 5...
Page 65: ...SiUS091601E Remote Controller 54 Part 5 Remote Controller 1 FTX Series 55 2 FVXS Series 57...
Page 144: ...Revision History Month Year Version Revised contents 02 2016 SiUS091601E First edition...