Microprocessor Control - Mitsubishi Electric MUZ-HJ VA Series Service Manual

9

MICROPROCESSOR CONTROL

MSZ-HJ25VA MSZ-HJ35VA MSZ-HJ50VA MSZ-HJ60VA MSZ-HJ71VA
WIRELESS REMOTE CONTROLLER
Signal transmitting section
Operation display section
ON/OFF (operate/stop) button
Fan speed control button
Operation select button
Timer mode select button
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
9-1. COOL ( ) OPERATION
(1) Press OPERATE/STOP (ON/OFF) 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 (TOO WARM or TOO COOL button) to select the desired temperature.
The setting range is 16 ~ 31°C.
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.
OBH647C
Operation state
The unit is operating to
reach the set temperature
The room temperature is
approaching the set tem-
perature
Temperature buttons
ECONO COOL button
Vane control button
Time set buttons
RESET button
Room temperature
About 2°C or more away
from set temperature
About 1 to 2°C from set
temperature
15
Lighted
Blinking
Not lighted