E5" Indoor Unit: Inverter Compressor Motor Lock - Daikin ALTHERMA HT Service Manual
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Also See for ALTHERMA HT:
- User manual (12 pages) ,
- Installer's reference manual (296 pages)
Table of Contents
ESIE09-08B
3.19 "E5 " Indoor Unit: Inverter Compressor Motor Lock
E5
Remote Control
Display
Subcode 6
All indoor units
Applicable
Models
Inverter PC board takes the position signal from UVW line connected between the inverter and
Method of
compressor, and the malfunction is detected when any abnormality is observed in the phase-
Malfunction
current waveform.
Detection
This malfunction will be output when the inverter compressor motor does not start up even in
Malfunction
forced startup mode.
Decision
Conditions
Compressor lock (liquid suction (oil shortage))
Supposed
High differential pressure (0.5MPa or more)
Causes
Incorrect UVW wiring
Faulty inverter PC board
Stop valve is left in closed.
220V. Use correct precautions when servicing.
Troubleshooting
Troubleshooting
Warning: CAPACITOR SHOCK HAZARD. The capacitors (top surfaces) can hold up to
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
Caution
Check the installation conditions.
Is
the stop valve
open?
YES
Is the UVW wiring
normal?
YES
Is high
differential pressure
starting? (0.5MPa or
more)
NO
Check
and see whether
compressor is short-circuited
or ground.
NO
Are inverter
output voltages the same
for 3 phases?
YES
Does low
or high pressure
vary even instantaneously
when restarting
compressor?
NO
Troubleshooting by Indication on the Remote Controller
NO
NO
YES
YES
NO
YES
Open the stop valve.
Connect correctly.
Remedy the cause.
Replace the compressor.
Replace the inverter PC
board Assy.
Replace the compressor.
(V2793)
157
Table of Contents
Troubleshooting
