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)

 

1C

 

1E

 

Miswiring in indoor/outdoor

 

Discharge temp.

 

units, gas leakage,

 

error, gas leakage

 

disconnection of TS/TC

 

(Check code 03,1E)

 

sensors (Check code 02, 1C)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is there miswiring of

NO

 

 

connectiong cable in A/B rooms

 

 

 

 

 

 

 

of indoor/outdoor rooms?

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace cables in A/B rooms

 

 

 

 

 

 

of outdoor terminal block

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valve drive check

 

 

 

 

 

 

 

 

NO

 

 

 

 

Is coil of the pulse motor valve

 

 

(P.M.V.) correctly set?

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operation

Check Item

Considerable main cause

Measues

Item by symptom

Set it correctly.

Is connecter of coil connected to inverter?

NO

Are connections of A/B rooms correct?

 

 

YES

 

 

 

 

 

 

Set it correctly.

Is positioning sound of valve (sound hitting to stopper) heard from valve

NO

 

 

 

 

when the air conditioner starts the operation after turning off power

 

Replace coil valve.

 

 

 

 

 

of the air conditioner once?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Are temp. sensors of indoor/outdoor units correctly set to the holder? NOTE :

The temperature sensors which are used to control pulse motor valve NOSet it correctly. 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).

YES

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 (“Pi” 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 of compressor. 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.

YES

If there is condensation at outlet (1/4 inch=Ø6.35mm valve side),

 

the valve is clogged.

 

Replace valve.

Check the operating pressure from service port, and add gas if pressure is low.

Add gas.

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Toshiba RAS-M13EKCVP-E, RAS-M18EACV-E, RAS-M18EAV-E Check Code 1C Miswiring in indoor/outdoor units and 1E, Check procedure
Page 89 Page 91

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