SiBE04-101
Troubleshooting
Service Diagnosis
109
4.20
Operation Halt Due to Detection of CT Error
Remote Controller
Display
H8
Outdoor unit LED
Display
A
5
1
4
2
4
3
3
4
3
Method of
Malfunction
Detection
CT errors are detected using the compressor's operating frequency and the input current detected by the
CT.
Malfunction
Decision
Conditions
When the compressor's operating frequency is more than 56 Hz and the CT input is less than 0.1 V.
∗
Input current 0.5 A
When a CT error is generated 4 times, the system shuts down.
Supposed Causes
Faulty power transistor
Breaking of wire or faulty connection of internal wiring
Faulty outdoor PCB (1).
Faulty rectifier
Troubleshooting
Check No.14
Refer to P.122
Check No.14
Check capacitor voltage.
∗
Is
operation current on
inter connecting wire (1) or
(3) like as right
figure?
NO
YES
YES
Is voltage
350±30 VDC?
Is the harness
of the electrical parts connect
correctly?
Does
abnormality display
appear before compressor
starts?
Operate unit.
Turn off power, and turn on again.
NO
YES
NO
NO
YES
To section about thermistor
abnormalities
Replace outdoor unit PCB.
Replace the outdoor unit PCB.
Connect correctly.
Erroneous wiring/Wire breakage.
Replace the outdoor unit PCB.
2sec
Current
(Approx)
Capacitor will be charged
when MRM 10 is ON.
Current rize together
with frequency rize.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Time
(R1178)
SiBE04-101.book Page 109 Monday, October 15, 2001 3:08 PM
