Toshiba RAS-10SKVP2-E Service Manual page 69

Block distinction
Check Check
Block
code code
Serial signal
and connecting
cable.
Operation signal of the indoor unit shall be measured in the sending period as
Note :
picture below.
Sending signal of the indoor unit when have not return
VDC
60
3 minutes Delay, start
counting from power
supply ON or remote
OFF.
15
0
3
* Signal send only 1 minute and stop. Because of return signal from outdoor unit has not received.
** Signal resend again after 3 minutes stop. And the signal will send continuously.
*** 1 minute after resending, the indoor unit display flashes error.
Operation of diagnosis function
Cause of operation
1) Defective wiring of the
connecting cable or
miss-wiring.
2) Operation signal has not
send from the indoor unit
when operation start.
3) Outdoor unit has not
send return signal to the
indoor unit when operation
started.
4) Return signal from the
outdoor unit is stop during
operation.
Some protector
(hardware, if exist) of the
outdoor unit open
circuit of signal.
Signal circuit of indoor
P.C. board or outdoor
P.C. board is failure
in some period.
signal from the outdoor unit.
3 minutes stop
*
Voltage variation stop
or have not voltage
output.
4 7
Air
Display flashing
conditioner
error
status
Indoor unit Flashes when
operates error is detected.
continue. Flashing stop
Outdoor unit and outdoor unit
stop. start to operate
when the return
signal from the
outdoor unit is
normal.
***
**
8
Time (Min)
– –
68
FILE NO. SVM-110015-1
Action and Judgment
1) to 3) The outdoor unit never
operate.
Check connecting cable and correct
if defective wiring.
Check 25A fuse of inverter P.C. board.
Check 3.15A fuse of inverter
P.C. board.
Check operation signal of the indoor
unit by using diode. Measure voltage
at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
4) The outdoor unit abnormal stop at
some time.
If the other check codes are found
concurrently, check them together.
Check protector (hardware) such
as Hi-Pressure switch,
Thermal-Relay, etc.
Check refrigerant amount or any
possibility case which may caused
high temperature or high pressure.
Check operation signal of the indoor
unit by using diode. Measure voltage
at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.