Microprocessor Control - Mitsubishi Electric MSZ-AP25VG Service Manual

9

MICROPROCESSOR CONTROL

MSZ-AP25VG MSZ-AP35VG
MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK
WIRELESS REMOTE CONTROLLER
Operation display section
TEMPERATURE buttons
NOTE: Last setting will be stored after the unit is turned OFF with the remote controller. Indoor unit receives the signal of the
remote controller with beeps.
INDOOR UNIT DISPLAY SECTION
Operation Indicator lamp
The operation indicator at the right side of the indoor unit indicates the operation state.
•The following indication applies regardless of shape of the indication.
Indication
The unit is operating to
reach the set temperature
The room temperature is
approaching the set tem-
perature
Standby mode
(Only during multi system
operation)
9-1. COOL ( ) OPERATION
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select COOL mode with OPERATION SELECT button.
(3) Press TEMPERATURE buttons TEMP
1. Coil frost prevention
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil
from frosting.
When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.
The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor
heat exchanger rises.
2. Low outside temperature operation
When the outside temperature is lower, low outside temperature operation starts, and the outdoor fan slows or stops.
3. Indoor fan speed control
When the thermostat turns OFF, the indoor fan operates very Low to reduce power consumption.
When the room temperature rises and the thermostat is ON, the indoor fan operates according to the settings on the
remote controller.
OBH788
MSZ-AP42VG
Signal transmitting section
Distance of signal : About 6 m
Beep(s) is (are) heard from
the indoor unit when the
signal is received.
OPERATION SELECT button
ECONO COOL button
NIGHT MODE button
STOP/OPERATE
(OFF/ON) button
Indication of
remote controller
model is on back
Operation state Room temperature
About 2°C or more away
from set temperature
About 1 to 2°C from set
temperature
or button to select the desired temperature. The setting range is 16 - 31°C.
MSZ-AP50VG
i save button
WEEKLY TIMER
-
12
FAN SPEED CONTROL button
WIDE VANE button
VANE CONTROL button
TIME, TIMER set buttons
FORWARD button
BACKWARD button
WEEKLY TIMER
set button
RESET button
CLOCK SET button
Lit
Blinking
Not lit