42
2. SELF DIAGNOSTIC FUNCTION WITH REMOTE CONTROLLER
2-1 When malfunction occurs during operation
When a malfunction occurs, the indoor and outdoor units stop and the malfunction is displayed on the LCD of the remote con-
troller.
(1) ON the set temperature display part, “CHECK” appears, and the unit
address and the check code are diplayed alternately at one-second
intervals. (Check mode)
2-2 How to use the self diagnostic function for service
A. For normal control with one unit and one remote controller
(1) Pressing the CHECK button on the remote controller twice starts the self diagnostic function.
(2) During the self diagnostic function, “CHECK” appears at two positions on the remote controller display. Then, at least
10 seconds later, the unit address and the check code is alternately displayed at one-second intervals.
(3) Check and repair the unit according to the check code. (Refer to the next page.)
2-3 For group control using one remote controller
(1) Press the TEMP. or TEMP. button on the remote controller to advance or go back to the unit address. Each time
TEMP. button is pressed, the unit address advances by one. Each time TEMP. button is pressed, the unit
address goes back by one.
The check code and the unit address, appear alternately.
(2) The check code “U8” means no malfunction has occurred since installation.
The check code “EO” means the following conditions:
●
The unit address displayed on the remote controller does not apply to any unit.
●
power is not supplied to the unit.
●
Signal transmitting/receiving circuit is abnormal.
(3) Check and repair the unit according to the check code. (Refer to the next page.)
CHECK
°C
CHECK
°C
Example
Altenately
displayed
Unit address
Check code
(2) When one remote controller controls several units in the group con-
trol, the LCD shows the unit address and check code of the first mal-
functioning unit.
(3) To cancel the check mode, press the
[
ON/OFF button. In remote
ON/OFF control, press the remote
[
ON/OFF switch. In centralized
control, turn OFF the
[
ON/OFF button of centralized controller.
NOTE: The latest check code is memorized, even if the check mode is cancelled by the way mentioned above. It takes
60 seconds maximum to display the memorized check code.
FILTER
CHECK MODE
TEST RUN
