Sharp R-426H Service Manual download pdf (Page 164)

4. Service procedures

IV - 27

Never press CL (clear) button unless you want to erase the accessed data in memory.

Follow the procedure below only when erasing is necessary.

❏ To erase accessed data, press the CL button.

❏ When erasing is finished,“----” mark appears on the controller’s display.

After checking the alarm messages, be sure to press the TEST / CHK button.

(E) Check the remote controller itself for correct operation

The remote controller has a self-diagnostic function to check if it works properly. Use this

procedure to find out if the remote controller itself is in trouble.

a Turn ON the RCU.CK switch on the back of the P.C.B. Ass’y in the remote controller.

See section (A) for exact location.

b The appearance of the display will tell you whether or not the remote controller is

working correctly or not.

❏ Normal condition – All displays appear for 10 seconds, then disappear.

❏ Unusual condition – All displays flash ON and OFF for 10 seconds, then

disappear.

After checking the panel, be sure to set the RCU.CK switch to this original OFF

position.

Important

CAUTION

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Sharp R-426H Service Manual Page 164