Toshiba RAS-B05J2KVG-E Service Manual page 84

Block distinction
Check Check
Block
code
Outdoor P.C.
board
* 4 or 8 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started.
After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times)
When error count comes 4, 8, 11 or 18 times, record error to check code. But after re-starting operation, if no error
is detected and air conditioner can operate more than 6 minutes, error count is cleared.
The others
(including
compressor)
Operation of diagnosis function
Cause of operation
code
Compressor drive output error.
(Relation of voltage, current
and frequency is abnormal)
Overloading operation of
compressor caused by
over-charge refrigerant,
P.M.V. failure, etc.
Compressor failure (High
current).
Return signal of the outdoor
unit has been sent when
operation start. But after
that, signal is stop some time.
Instantaneous power
failure.
Some protector
(hardware) 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.
Air
Display flashing
conditioner
error
status
All OFF Flashes after
error is detected
8 times*.
Indoor unit Flashes when
operates error is detected. 2. If the air conditioner repeat operates
continue. Flashing stop
Outdoor unit and outdoor unit
stop. start to operate
when the return
signal from the
outdoor unit is
normal.
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FILE NO. SVM-19001
Action and Judgment
1. Check installation conditions such as
packed valve opening, refrigerant
amount and power supply (rate +10%,
both of operation and non operation
condition).
2. Check P.M.V. by measure the
resistance of the coil and confirm its
operation (sound of initial
operation, etc.)
3. Observe any possibility cause which
may affect operation load of
compressor.
4. Operate again. If compressor
operation is failure when 20 seconds
passed (count time from operation
starting of compressor), replace
compressor.
1. Check power supply (Rate + 10%)
and stop with interval of approx. 10
to 40 minutes.
Check protector (hardware) such
as Hi-Pressure switch,
Thermal-Relay, etc.
Check refrigerant amount, packed
valve opening and any possibility
cause which may affect high
temperature or high pressure.
3. 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.