Toshiba RAS-B10GKVP-E Service Manual page 87

11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E
<Check procedure>
1C
Disconnection of TGa sensor.
TGb sensor, P.M.V sensor error
(Check dode 02,1C)
Is connecter of coil connected to inverter?
Are connections of A/B rooms correct?
Is positioning sound of valve (sound hitting to stopper) heard from valve when the
air conditioner starts the operation after turning off power of the air conditioner once?
Are temp. sensors of indoor/outdoor units correctly set to the holder?
NOTE :
The temperature sensors which are used to control pulse motor valve
include indoor heat exchanger sensor (TC), A room gas side temp. sensor (TGa),
B room gas side temp. sensor (TGb), and outdoor suction temp. sensor (TS).
Gas amount check and valve clogging check
Check them when operation is performed is only one of A or B room.
Remove TC sensor connector from the P.C. board in indoor unit.(Remove connector from the P.C. board.)
Operate the air conditioner in COOL mode by TEMP button ("Beep" sound is heard if keeping pushed for 10 seconds.).
The operation enters temporary operation mode which fixes opening degree of P.M.V. and No. of revolution ofcompressor.
Check condensation at outlet of P.M.V., and then check operating pressure from the service port.
Existence of condensation at outlet of P.M.V.
If there is condensation at outlet (1/4 inch=Ø6.35mm valve side), the valve is clogged.
Check the operating pressure from service port, and add gas if pressure is low.
Tel: 01823 665660
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1C
Miswiring in indoor/outdoor units,
gas leakage, disconnection of
TS/TC sensors
(Check code 02, 1C)
Is there miswiring of
connectiong cable in A/B rooms
of indoor/outdoor rooms?
YES
Replace cables in A/B rooms
of outdoor terminal block
Valve drive check
Is coil of the pulse motor valve
(P.M.V.) correctly set?
YES
YES
YES
YES
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1E
Discharge temp.error,
gas leakage
(Check code 03,1E)
NO
NO
NO
– 87 –
Operation
Check Item
Considerable principle cause
Measures
Item by symptoms
Set it correctly.
Set it correctly.
Replace coil valve.
Set it correctly.
YES
Replace valve.
Add gas.
Fax: 01823 665807