Microprocessor Control - Mitsubishi Electric SLH Series Technical & Service Manual

8

MICROPROCESSOR CONTROL

1. COOL operation
ON/OFF
ON/OFF
TOO TOO
WARM COOL
FAN SELECT
AUTO COOL
FAN
VANE TIME
HEAT DRY
MODE
MODE
RESET
SLH-1AR
SLH-1.6AR
SLH-2AR
<COOL operation time chart>
Thermostat
Indoor fan
Compressor
Outdoor fan
W1 Even if the room temperature rise above the set temperature during this period, the compressor will not start until this
period end.
(1) Compressor control
1 3-minute time delay
To prevent overload, the compressor will not start within 3 minutes after stop.
2 The compressor runs when the room temperature is higher than the set temperature.
The compressor stops when the room temperature is equal to or lower than the set temperature.
3 The compressor stops in check mode.
(2) Indoor fan control
Indoor fan speed LOW/MED./HIGH depends on the remote controller setting.
(3) Outdoor fan control
POWER ON/OFF with the compressor.
(4) Coil frost prevention
1 Temperature control
When the indoor coil thermistor RT12 reads -1°C or below, the coil frost prevention mode starts immediately.
However the coil frost prevention will not work for 10 minutes after the compressor starts.
During the coil frost prevention compressor stops and the indoor fan operates at the set speed for 5 minutes.
After that, if RT12 still reads or below -1°C, this mode prolonged until the RT12 reads over -1°C.
After the coil frost prevention stops, units will not enter this mode again at least 10 minutes even RT12 reads -1°C.
2 Time control
When the three conditions below have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes.
a. Compressor has been continuously operating.
b. Indoor fan speed is LOW / MED.
c. Room temperature is below 26°C.
When compressor stops ,the accumulated time is cancelled and when compressor restarts, time counting starts from
the beginning.
Time counting also stops temporarily when the indoor fan speed becomes HIGH or the room temperature exceeds 26°C.
However, when two of the above conditions (b. And c.) are satisfied again time accumulation is resumed.
<How to operate>
1 Press POWER ON / OFF button.
2 Press MODE SELECT button to set operation mode to COOL.
TOO TOO
WARM COOL
Each time the MODE SELECT button is pressed the DISPLAY "
FAN SELECT
controller moves.
COOL
3 Press the SET TEMPERATURE button to set the desired temperature.
VANE TIME
DRY
NOTE: The set temperature changes 1°C when the
RESET
SL-1AR
SL-1.6AR
SL-2AR
Operation starts by
P O W E R b u t t o n
ON.
ON
OFF
LOW or MED. or HIGH
ON
OFF
ON
}
OFF
press one time Cooling 19 to 30°C.
Room temperature Room temperature
becomes equal to rises above set
set temperature. temperature.
MIN. 3 minutes
47
or
Operation stops by
P O W E R b u t t o n
OFF.
LOW or MED. or HIGH
1
" on the remote
button is