Outline Of Operation Control By Microcomputer - Mitsubishi Heavy Industries SRK25GZ-L1 Handbook

2.4

OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

2.4.1 Table for operation control
Functions
High efficiency, low input rotary
compressor
Wireless remote control
Dry
ON TIMER
OFF TIMER
Automatic fan control
Micro computer (MC)
controlled timely
defrosting operation
(in heating)
M. C. (Micro computer
controlled) thermostat
Remote control flap
Comfort timer
(Cooling & Heating)
Self Diagnosis
Function
Content
Low input rotary compressor with high efficiency is equipped.
All operation modes can be operated from distance place by the wire-
less remote control. And also liquid crystal is used to show all kinds to
operation or, off, air flow switch, operation switch, timer switch, timer
set, temperature set, flap control.
Defumidifies while keeping room temperature to the thermostat setting
level by M.C. thermostat.
ON timer setting for anytime during 24 (32, 40: 12) hours can be performed.
OFF timer setting for favourite time can be performed. Comfortable
Cooling and Dry operation to prevent catching cold in sleep and eco-
nomical operation can be performed, while raising room temperature
setting during 1 hour period in steps.
While COOL & DRY: When the timer is set to OFF the temperature is
increased by 0.5ºC simultaneously, by 0.5ºC additionally every 30
minutes and by 1.5ºC in one hour.
While HEAT: When the timer is set to OFF the temperature is de-
creased by 1ºC simultaneously by 1ºC additionally every 30 minutes
and by 3ºC in one hour. (Heat Pump type only)
Room unit air volume can be automatically controlled step by step,
according to the difference between room temperature and setting tem-
perature.
1. Shorten pull down time for cooling/heating operation
2. Low noise level operation can performed by proper air volume.
When heating is initiated, thermostat reset, or heating re-
sumed after defrosting, the indoor fan is automatically controlled
HOT START
stop to set value in accordance with the temperature of the indoor air
heat exchanger to prevent the blowing out of cold air.
The thermostat temperature setting is automatically in-
HOT SPURT
creased by 2ºC when heating is initiated to provide faster stabiliza-
tion of room temperature.
The indoor fan is stopped depending on the temp, of the indoor heat
exchanger to prevent the blowing-out of cold air when the
HOT KEEP
heating operation is stopped by thermostat or defrosting
operation is started.
The change in the difference between the intake air temperature and the
heat exchanger temperature causes the frost and condensation removal
operation to start.
M. C thermostat improves on energy saving and comfort, by control-
ling room temperature with high accuracy.
The flap can be automatically controlled by operating wireless remote
control.
• AUTO (Natural flow) : Flap operation is automatically controlled.
• Swing
• Memory flap
The room temperature is checked 60 minutes before the timer is at ON.
Depending on the temperature at that time, the operation starets 5 to 60
minutes before the timer is at ON.
We are constantly trying to do better service to our customers by in-
stalling such judges that show abnormality of each function as follows:
• Abnormality of outdoor unit:
TIMER lamp flashing.
• Abnormality of indoor fan motor:
RUN lamp flashing.
• Abnormality of heat exchanger thermistor:
RUN lamp flashing.
• Abnormality of room temperature thermistor:
RUN lamp flashing.
: This will swing the flap up and down.
: Once the flap position is set, the unit memo-
rizes the position and continues to operate at
the same position from the next time.
}
No lamp will flashing
when the unit is op-
erating
SRK-H
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