Mitsubishi Heavy Industries SRK60ZJX-S, Technical Manual

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152
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'10 • SR-T-091
(6) Outline of heating operation
(a) Operation of major functional components in heating mode
(b) Details of control at each operation mode (pattern)
1) Fuzzy operation
Deviation between the indoor temperature setting correction temperature and the return air temperature is calculated in
accordance with the fuzzy rule, and used for control of the air capacity and the compressor speed.
When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode.
2) Hot keep operation
If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature
of the indoor heat exchanger (Th2) to prevent blowing of cool wind.
ON OFF
ON ON
ON
OFF
(few minutes ON)
ON ON(HOT KEEP)
OFF
OFF
(3 minutes ON)
OFF
OFF
Thermostat ON Thermostat OFF Failure
Heating
Compressor
Indoor fan motor
Outdoor fan motor
4-way valve
30~115rps
30~115rps
30~76rps
30~46rps
SRR35ZJ-S
30~102rps
30~102rps
30~72rps
30~42rps
SRR25ZJ-S
Model
Fan speed
Auto
MED
HI
LO
(b) Sleep timer operation
Pr essing the SLEEP button causes the temperature to be controlled with respect to the set temperature .
(5) Timer operation
(a) Comfortable timer setting (ON timer)
(c) OFF timer operation
The Off timer can be set at a specific time (in 10-minute units) within a 24-hour period.
If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode
operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value
of 15 minutes and the relationship between the indoor temperature at the setting time (temperature of room temperature sensor)
and the setting temperature.
(c) Defrosting operation
1)
Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)
a) After start of heating operation
When it elapsed 45 minutes. (Accumulated compressor operation time)
b) After end of defrosting operation
When it elapsed 45 minutes. (Accumulated compressor operation time)
c) Outdoor heat exchanger sensor (TH1) temperature
When the temperature has been below –5ºC for 3 minutes continuously.
d) The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature
¡
The outdoor air temperature ≧ 0°C : 7°C or higher
¡
-15°C ≦ The outdoor air temperature ＜ 0°C : 4/15 × The outdoor air tempe 7°C or higher
¡
The outdoor air temperature < -15°C : -5°C or higher