L8" Indoor Unit: Inverter Current Abnormal - Daikin ERSQ 011AAV1 Service Manual

Troubleshooting by Indication on the Remote Controller
3.43 "L8 " Indoor Unit: Inverter Current Abnormal
L8
Remote Control
Display
Subcode 10
Applicable
All indoor units
Models
Method of Malfunction is detected by current flowing in the power transistor.
Malfunction
Detection
Malfunction
When overload in the compressor is detected.
Decision
Conditions
Supposed
Causes
Troubleshooting
Output current check
182
Compressor overload
Compressor coil disconnected
Defect of indoor unit PC board [A4P (1
Current protection (thermal)
Caution
The
secondary current
of the inverter is higher
than 13.1A, 260 sec for
each phase.
NO
Compressor
inspection The
compressor's coil is
disconnected.
NO
Disconnect the connection
between the compressor and
inverter. Make the power
transistor check mode setting
ON by service mode.
Inverter
output voltage
check Inverter output
voltage is not balanced
(Normal if within 5V). Must
be measured when
frequency is stable
YES
After
turning on again,
"L8 - 10" blinks again.
YES
ø
) or A5P (3
YES
YES
NO
NO
ø
)]
Compressor overload
Inspection of the compressor and
refrigerant system is required
Replace the compressor
Replace the inverter PC board assy
[A4P (ø) or A5P (ø)]
Reset en Restart
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor
ESIE09-08
Troubleshooting