L5" Indoor Unit: Inverter Compressor Abnormal - R-134A - Daikin ALTHERMA HT Service Manual

ESIE09-08B
3.42 "L5 " Indoor Unit: Inverter Compressor Abnormal - 
R-134a
L5
Remote Control
Display
Subcode 13
All indoor units
Applicable
Models
Malfunction is detected from current flowing in the power transistor.
Method of
Malfunction
Detection
When an excessive current flows in the power transistor.
Malfunction
(Instantaneous overcurrent also causes activation.)
Decision
Conditions
 Overcurrent immediate
Supposed
 Defect of compressor coil (disconnected, defective insulation)
Causes
 Compressor start-up malfunction (mechanical lock)
 Defect of inverter PC board [A4P (1
Troubleshooting
Compressor inspection
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
Troubleshooting
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
Caution
The
compressor's coil is
YES
disconnected or the
insulation is
defective.
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.
YES
(Normal if within ±5V Must be
measured when
frequency is stable.
NO
YES
There is instantenious
power drop.
NO
Troubleshooting by Indication on the Remote Controller
ø ø
) or A5P (3 )]
Replace the compressor.
Replace the inverter PC Board assy [A4P (1ø) or A5P (3ø)].
Correct power supply.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
183