L8" Outdoor Unit: Inverter Current Abnormal - Daikin ALTHERMA HT ERSQ 011 AA Service Manual

Troubleshooting by Indication on the Remote Controller
3.43 "L8 " Outdoor Unit: Inverter Current Abnormal
L8
Remote Control
Display
Applicable Models ER*Q 011~016*
Method of
Malfunction is detected by current flowing in the power transistor.
Malfunction
Detection
Malfunction When overload in the compressor is detected.
Decision Conditions
 Compressor overload
Supposed Causes
 Compressor coil disconnected
 Defect of outdoor unit PC board (A2P)
Troubleshooting
194
Be sure to turn off power switch before connect or disconnect connector, or
Caution
parts damage may be occurred.
Output current check
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" blinks again.
YES
YES
YES
NO
NO
ESIE09-08A
Compressor overload
Inspection of the compressor and
refrigerant system is required.
Replace the compressor.
Replace the inverter PC board assy
(A2P).
Reset and restart.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
(V3184)
Troubleshooting