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4. Auxiliary Electric Heater
• If the “HEAT” mode provides insufficient heating to a room even at the highest temperature
setting (30°C), press the HEATER key to activate the auxiliary electric heater. For models
with two heaters, consecutive press of the key allows the selection of one or both heaters active.
5. Temperature Setting
• To set the desired room temperature, press
▲
or
▲
to increase or decrease the set
temperature in the range of 16°C to 30°C.
• Press both
▲
and
▲
simultaneously to toggle between °C and °F setting.
6. Time Setting
Real time clock
• Press the CLOCK key once to activate set clock mode.
• Press again to disable set clock mode.
• Under set clock mode, the time of the present day can be set by pressing the respective
MINUTE, HOUR and DAY key.
7 Days Timer
• Press the ON TIMER key to activate auto ON timer mode. Under this mode, press the
respective MINUTE, HOUR and DAY key to select the time of the week when the air-
conditioning unit is to automatically start running. Press ON TIMER key again to save the setting.
• Press the OFF TIMER key to activate auto OFF timer mode. Under this mode, press the
respective MINUTE, HOUR and DAY key to select the time of the week when the
air-conditioning unit is to automatically stop running. Press the ON TIMER key again to save
the setting.
• Then to activate the 7 days timer, press and hold the TIMER ACTIVE key until the word
“TIMER ACTIVE” appears on the LCD screen. Repeat the same step to disable the 7 days timer.
7. Other Function
Key Lock
• Press the MINUTE key 3 times consecutively to activate the key lock. A “KEY LOCK” symbol
will appear on the LCD screen. At this point, only the ON/OFF key is valid.
• To disable the key lock, again press the MINUTE key 3 times consecutively.
Test Run
• Press the TEST RUN key 2 times consecutively to test run the unit.
Summary of Contents for M4LC
Page 1: ...Service Guide Book...
