L1" Indoor Unit: Malfunction Of Pc Board - Daikin ERSQ 011AAV1 Service Manual

Troubleshooting by Indication on the Remote Controller
3.37 "L1 " Indoor Unit: Malfunction of PC Board
L1
Remote Control
Display
Subcode 30
Applicable
All indoor units
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
176
Detect malfunctions by current value during waveform output before compressor startup.
Detect malfunctions by current sensor value during synchronized operation at the time of
startup.
In case of overcurrent (OCP) during waveform output
When the current sensor malfunctions during synchronized operation
In case of IGBT malfunction
Faulty indoor PC board [A4P (1
• Over current
• Current sensor failure
• Failure of IGBT or drive circuit
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Turn OFF the power
supply once and then turn
it ON again.
YES
Does it return
normally?
NO
ø ø
) or A5P (3 )]
ESIE09-08
It is believed that external
factors (noise, etc.) other
than failure caused the
malfunction.
Replace the indoor PC board
ø ø
[A4P (1 ) or A5P (3 )].
(PC board equipped with a
resin case)
Troubleshooting