Service manual

13-9
CONTROL SYSTEM > GC 18/GC 21
SM HADDCI 1-A.2 GB
13.10 On Unit Controls and Indicators
13.10.1 Indoor Unit controller Controls and Indicators
STAND BY
INDICATOR
1. Lights up when the Air Conditioner is connected to power
and the mode is STBY.
2. Blinks for 3 times at 600 msec each cycle, when the system
is switched to Heat Mode by using the Mode/Reset Switch
on the unit (the operation indicator will be off during this
blinking time).
OPERATION
INDICATOR
1. Lights up during operation mode (except for item in STBY
indicator).
2. Blinks for 600 msec. cycle, to announce that a R/C infrared
signal has been received and stored.
3. Blinks continuously during protections (according to the
relevant spec section).
4. Blinks for 3 times at 600 msec each cycle when the system
is switched to Cool Mode by using the Mode/Reset Switch
on the unit
TIMER INDICATOR Lights up during Timer and Sleep operation.
FILTER INDICATOR Lights up when Air Filter needs to be cleaned.
Mode/Reset Button
As long as the filter Led is off, the Mode/Reset button functions as Mode
switch. Once filter Led is on, the Mode/Reset button functions as Reset
switch.
Mode Function:
Every short pressing , the next operation mode is selected, in this order:
SB → Cool Mode → Heat Mode → SB → ... In long pressing system
enters diagnostic mode (refer to diagnostic mode Sect.)
Reset Function:
For short pressing:
When Filter LED is on, it turns off the filter indicator.
ESF Lights up us long as the ESF as on
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