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4. Service procedures
Important
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.
CAUTION
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.
CAUTION
After checking the panel, be sure to set the RCU.CK switch to this original OFF
position.
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