Service manual

11-11
CONTROL SYSTEM
SM DUO38 1-E.1 GB
11.18 Indoor Unit Dry Contact
Indoor unit Dry contact has two alternative functions that are selected
by J8.
Function Contact = Open Contact = Short
J8 = Open Presence Detector Connection No Limit Forced to STBY
J8 = Short Power Shedding Function No Limit Limit NLOAD
11.19 Operating the Unit from the Mode Button
Forced operation allows starting, stopping and operating in Cooling or Heating, in pre-
set temperature according to the following table:
Forced operation Mode Pre-set Temperature
Cooling 20
0
C
Heating 28
0
C
11.20 On Unit Controls and Indicators
11.20.1 Indoor Unit Controller Controls and Indicators for All Models
Except for Floor/Ceiling model
STAND BY INDICATOR
1. Lights up when the Air Conditioner is connected to power
and ready to receive the R/C commands
OPERATION INDICATOR
1. Lights up during operation.
2. Blinks for 300 msec., to announce that a R/C infrared
signal has been received and stored.
3. Blinks continuously during protections (according to the
relevant spec section).
TIMER INDICATOR Lights up during Timer and Sleep operation.
FILTER INDICATOR Lights up when Air Filter needs to be cleaned.
COOLING INDICATOR
Lights up when system is switched to Cool Mode by using the Mode
Switch on the unit.
HEATING INDICATOR
Lights up when system is switched Heat Mode by using the Mode
Switch on the unit.
Mode SWITCH
(COOL/HEAT/OFF)
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.
RESET / FILTER SWITCH
For short pressing:
When Filter LED is on - turn off the FILTER INDICATOR after a clean
filter has been reinstalled.
When Filter LED is off – enable/disable the buzzer announcer, if
selected.
CONTENT