Service manual

Troubleshooting ESIE03–01
3–4 Part 3 – Troubleshooting
3
1
3
4
5
1.2 Overview of General Problems
Introduction The general problems are:
P None of the indoor units operates
P Equipment operates but stops sometimes
P Some indoor units do not operate (twin / triple)
P Equipment operates but is not able to cool
P Abnormal operating noise and vibrations
P Equipment does not operate (operation light OFF)
P Poor cooling or heating
P Operation stops suddenly (operation light flashes)
P Abnormal functioning.
None of the indoor
units operates
To troubleshoot, check the following:
P Make sure the rated voltage is supplied.
P Make sure the indoor unit type is compatible with the outdoor unit.
P Troubleshoot with the indoor unit LEDs.
P Make sure the address for the remote controller and indoor unit are set correctly. See page 4–5.
Equipment
operates but stops
sometimes
To troubleshoot, check the following:
P A power failure of 2 to 10 sine wave cycles can stop air conditioner operation.
P Cooling operation cannot be used when the outside temperature is below 0°C.
P Troubleshoot with the indoor unit LEDs. See page 3–15.
Some indoor units
do not operate
(twin / triple)
To troubleshoot, check the following:
P Make sure the indoor unit type is compatible with the outdoor unit.
P Troubleshoot with the indoor unit LEDs. See page 3–15.
Equipment
operates but is not
able to cool
To troubleshoot, check the following:
P Make sure the thermistor has not disconnected from the pipe holder.
P Troubleshoot with the indoor unit LEDs. See page 3–15.
P Check for gas shortage. See page 3–62.