Overview Of General Problems - Daikin Sky Air R-407C Service Manual

Troubleshooting
1.2

Overview of General Problems

1
Introduction
3 3
None of the indoor
units operates
4
5
Equipment
operates but stops
sometimes
Some indoor units
do not operate
(twin / triple)
Equipment
operates but is not
able to cool
3–4
The general problems are:
None of the indoor units operates
Equipment operates but stops sometimes
Some indoor units do not operate (twin / triple)
Equipment operates but is not able to cool
Abnormal operating noise and vibrations
Equipment does not operate (operation light OFF)
Poor cooling or heating
Operation stops suddenly (operation light flashes)
Abnormal functioning.
To troubleshoot, check the following:
Make sure the rated voltage is supplied.
Make sure the indoor unit type is compatible with the outdoor unit.
Troubleshoot with the indoor unit LEDs. See page 3–11.
Troubleshoot with the outdoor unit LEDs. See page 3–12 and 3–13.
Make sure the address for the remote control and indoor unit are set correctly. See page 4–5.
To troubleshoot, check the following:
A power failure of 2 to 10 sine wave cycles can stop air conditioner operation.
Cooling operation cannot be used when the outside temperature is below 0˚C.
Troubleshoot with the indoor unit LEDs. See page 3–11.
Troubleshoot with the outdoor unit LEDs. See page 3–12 and 3–13.
To troubleshoot, check the following:
Make sure the indoor unit type is compatible with the outdoor unit.
Troubleshoot with the indoor unit LEDs. See page 3–11.
Troubleshoot with the outdoor unit LEDs. See page 3–12 and 3–13.
To troubleshoot, check the following:
Make sure the thermistor has not disconnected from the pipe holder.
Troubleshoot with the indoor unit LEDs. See page 3–11.
Troubleshoot with the outdoor unit LEDs. See page 3–12 and 3–13.
Check for gas shortage. See page 3–54.
ESIE02–01
Part 3 – Troubleshooting