Mitsubishi PK12FK Instruction Manual page 46

2-4 When malfunction occurs during operation·····PK12/18/24/30/36FK
When a malfunction occurs, the indoor and outdoor units stop and the malfunction is displayed on the LCD of the remote
controller.
(1) ON the set temperature display part, "CHECK" appears, and
the unit address and the check code are displayed at one-second intervals. (Check mode)
Example
(2) When one remote controller controls several units in the group control,
the LCD shows the unit address and check code of the first malfunc-
tioning unit.
(3) To cancel the check mode, press the power ON/OFF button.
NOTE: The latest check code is memorised, even if the check mode is cancelled by the way mentioned above. It takes
60 seconds maximum to display the memorised check code.
2-5 How to use the self diagnostic function for service·····PK12/18/24/30/36FK
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 displayed at one-second intervals.
(3) Check and repair the unit according to the check code. (Refer to page OC196A-47.)
2-6 For group control using one remote controller·····PK12/18/24/30/36FK
(1) Press the SET TEMP. button on the remote controller to advance or go back to the unit address. Each time SET TEMP.
button is pressed, the unit address advances by one. Each time SET TEMP.
the unit address goes back by one.
The check code and the unit address, appear will be displayed.
(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 page OC196A-47.)
CHECK
Unit
Check
address
code
, PK18/24/30/36FK
1
CHECK mode
OC196A-46
2
CHECK
MODE TIMER ON/OFF CLOCK/TIMER FAN SPEED AIR DISCHARGE FILTER
AIR SWEEP
SET TEMP. TIMER SET
REMOTE CONTROLLER
CHECK button
, PK18/24/30/36FK
1
, PK18/24/30/36FK
1 2
button is pressed,
CHECK
TEST RUN
2