Indoor Unit Control - Mitsubishi Electric PKH-2GKLA Technical & Service Manual

2. INDOOR UNIT CONTROL

2-1 COOL operation
ADDRESS
UNIT No.
FUNCTION No.
°C
SELECTION No.
AM
PM
FUNCTION
AM
TEST RUN
PM
CHECK
TEMP.
ON/OFF
<COOL operation time chart>
Thermostat
Indoor fan
Auto vane
Compressor
* 1 Even if the room temperature rise above the set temperature during this period, the compressor will not start until this
period has ended.
(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 room temperature is higher than set temperature.
The compressor stops when room temperature is equal to or lower than the set temperature.
The compressor maintains the previous state when the discharge temperature minus the set temperature is 0°C or more, or
lower than 1°C.
3 The compressor stops in check mode or during protective functions.
4 Coil frost prevention
To prevent indoor coil frost, the compressor will stop when the pipe temperature thermistor (RT2) reads 1°C or below after
Booster heater
the compressor has been continuously operated for at least 16 minutes or more. When the pipe temperature rises to 10°C
or above, the compressor will start in a 3-minute(* 2 ) time delay.
* 2 When the pipe temperature is -1°C or less, the compressor starts in 6 minutes.
NOTE : By turning OFF the dip switch SW1-3 on indoor controller board, the start temperature of coil frost prevention changes
from 1°C to -3°C.
OC231A
<How to operate>
1 Press POWER ON/OFF button.
2 Press the MODE button to display "
3 Press the
Operation starts by
P O W E R b u t t o n
ON.
ON
OFF
LOW or HIGH
ON
OFF
Initially 10 degrees
(Changeable by remote controller setting)
CLOSE
ON
OFF
OFF
OFF
ON
i
TEMP button to set the desired temperature.
NOTE: The set temperature changes 1°C when the
button is press one time Cooling 19 to 30°C.
Room temperature Room temperature
becomes equal to rises above set
set temperature. temperature.
Minimum 3 minutes *1
24
f
".
Operation stops by
P O W E R b u t t o n
OFF.
LOW or HIGH
CLOSE
or