Toshiba RAS-B10EKVP-E Service Manual page 68

Ilmalämpöpumppujen myynti, huolto ja asennus: Jäähdytinpalvelu RefGroup Oy.
Block distinction
Check Check
Block
code code
Outdoor P.C.
board
Not
displayed
Outdoor P.C.
board
Others
(including
compressor)
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Operation of diagnosis function
Air
Cause of operation conditioner
status
Inverter over-current All off
protective circuit
operates. (Short time)
Position-detect circuit All off
error or short-circuit
between windings of
compressor
Current-detect circuit All off
error
Being out of place, All off
disconnection or short-
circuit of the outdoor heat
exchanger sensor (TE) or
suction temp. sensor (Ts)
Disconnection or short- All off
circuit of discharge
temp. sensor
Outdoor fan drive All off
system error
Outdoor heat exchanger Operation
temp. sensor error continues
Compressor drive All off
output error, Compres-
sor error (lock, missing,
etc.), Break down
Return serial signal has Operation
been sent when continues
operation started, but it
is not sent from halfway.
(1) Compressor thermo.
operation
Gas shortage
Gas leak
(2) Instantaneous power
failure
Compressor does not All off
rotate.
(Current protective
circuit does not operate
when a specified time
passed after compres-
sor had been activated.)
Discharge temp. All off
exceeded 117°C
Break down of All off
compressor
Four-way valve inverse Operation
error (TC sensor value continues
lowered during heating
operation.)
– 68 –
Judgment and action
Remarks
Displayed when Even if trying operation again, all
error is detected. operations stop immediately. :
Replace P.C. board.
Displayed when 1. Even if connecting lead wire of
error is detected. compressor is removed,
position-detect circuit error
occurred. : Replace P.C. board.
2. Measure resistance between
wires of compressor, and
perform short-circuit. : Replace
compressor.
Displayed when Even if trying operation again, all
error is detected. operations stop immediately. :
Replace P.C. board.
Displayed when 1. Check sensors (TE, TS).
error is detected.
2. Check P.C. board.
Displayed when 1. Check discharge temp. sensor
error is detected. (TD).
2. Check P.C. board
Displayed when Position-detect error, over-current
error is detected. protective operation of outdoor fan
drive system, fan lock, etc. :
Replace P.C. board or fan motor.
1. Check outdoor temp. sensor
—— (TO).
2. Check P.C. board.
Displayed when When 20 seconds passed after
error is detected. start-up, position-detect circuit
error occurred. : Replace compres-
sor. Trouble on P.M.V.
Flashes when 1. Repeat Start and Stop with
trouble is detected interval of approx. 10 to 40
on return serial minutes. (Code is not displayed
signal, and normal during operation.)
status when signal Supply gas. (Check also gas
is reset. leak).
2. Unit operates normally during
check.
If return serial signal does not
stop between indoor terminal
block 2 and 3, replace inverter
P.C. board.
If signal stops between indoor
terminal block 2 and 3, replace
indoor P.C. board.
Displayed when 1. Trouble on compressor
error is detected.
2. Trouble on wiring of compressor
(Missed phase)
Displayed when 1. Check dischage temp. sensor
error is detected. (TD).
2. Gas leakage
3. Trouble on P.M.V.
Displayed when 1. Check power voltage.
error is detected. (220–230–240 V +10%)
2. Overload operation of refrigera-
tion cycle
Check installation condition
(Short-circuit of outdoor diffuser).
1. Check four-valve operation.
——