Si10-417
Troubleshooting
Service Diagnosis
91
5.2.33 CT or Related Abnormality
Remote
Controller
Display
H8
Method of
Malfunction
Detection
A CT or related error is detected by checking the
compressor running frequency and CT-detected input
current.
Malfunction
Decision
Conditions
The compressor running frequency is above 68 Hz and
the CT input is below 0.1 V.
(The input current is also below 1.25 A.)
If this error repeats 4 times, the system will be shut
down.
The error counter will reset itself if this or any other
error does not occur during the following 60-minute
compressor running time (total time).
Supposed
Causes
Power transistor defective
Internal wiring broken or in poor contact
Reactor defective
Outdoor unit PCB defective
Trouble
shooting
Check No.12
Refer to
P.163
DC290~380V?
Turn off the power and turn it
on again.
C
heck No.
12
Check the capacitor voltage.
Replace the outdoor
unit PCB.
Replace the outdoor
unit PCB.
Check the supply
voltage.
YES
NO
∗
Running
current as shown at right
with relay cable
1 or 2?
NO
YES
Voltage
within the allowable
range (Supply
voltage±15%)?
NO
YES
Get the system started.
Measure the rectifier input
voltage.
A
Rising with increasing
frequency
2 sec
Time
Capacitor charged
when the indoor unit
or outdoor unit main
relay turns on
Caution
Be sure to turn off power switch before connect or
disconnect connector, or parts damage may be occurred.
Current
(guideline)
Si10-417.fm Page 91 Wednesday, September 22, 2004 6:38 PM
