4. Service procedures
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Section
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SM830076
(7) Service Functions of Optional Wired Remote Controller
(Temperature displayed on the screen is not °F but °C.)
From the remote controller you can control both the operation and settings of the unit as well
as perform several useful service checks. This section explains how to use the remote
controller on the following items from (A) to (J).
(A) Set service check switches.
(B) Use the test run procedure.
(C) Check the sensor temperature readings.
(D) Find out about past service problems.
(E) Check the remote controller itself for correct operation.
(F) Excute the auto. address operation.
(G) Confirm and change the indoor unit address.
(H) Change the shift temperature in heating mode
( I ) Set the indoor unit address.
(J) Change the period of the filter timer
(A) Set service check switches
The service check switch (RCU.CK) is located on the back of the remote controller’s P.C.B.
Ass’y as follows :
ON OFF
RCU. ADR
switch
ON OFF
RCU. CK
switch
0354_M_I
The followings are the correct switch settings for ordinary use of the unit. Only change the
settings temporarily for making service checks. When you finish the settings, be sure to
return them to the standard settings shown here.
❏ RCU.CK switch - Refer to section (E) “ Checking the remote controller for correct
operation”
(Remote Control Unit, Check)
❏ RCU.ADR switch - Keep the switch OFF all the time except in case of sub remote
controller
(Remote Control Unit, Address)
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