Mitsubishi SRK90CL-BN, Техническое руководство

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'12 • SRK-T-122
(11) Protective control function
(a) Frost prevention for indoor heat exchanger
(During cooling or dehumidifying)
1) Operating conditions
a) Indoor heat exchanger temperature (TH2) is lower than 2.5ºC.
b) 3 minutes elapsed after the start of operation.
2) Detail of frost prevention operation
Compressor OFF
Indoor fan
Protects the fan tap just before frost prevention control.
Outdoor fan
Depending on the stop mode
3) Reset condition:
Indoor heat exchanger temperature (TH2) is higher than 15ºC.
(b) Dew condensation prevention control
[Cooling (including auto), cooling oriented dehumidifying operation]
1) Operating condition:
When the following conditions are met after 5 minutes or more of continuous operation after
operation starts.
• The humidity sensor (TH3) value is 68% or higher
2) Operation contents
a) Command of the electronic expansion valve.
b) When such a command is continued for 30 minutes or more, air direction
controls will be as listed below:
Humidity (%)
63 68
Reset
Prevention control
(d) Indoor fan motor protection
When the airconditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 rpm or
under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system.
TIMER light illuminates simultaneously and the RUN light flashing 6 times at each 8-second.
(e) 3 minutes forced operation
When the compressor begins operating the thermal operation is not effective for 3 minutes, so operation continues as is in the
operation mode. (After 3 minutes has passed the thermal operation is effective.)
However, stopping the compressor via a stop signal or protection control has priority.
(f) Abnormality of outdoor unit
When an abnormal stop occurs 3 times with automatic recovery within 20 minutes after the outdoor unit’s power supply was
turned on.
3) Reset condition:
When the following condition is satisfied.
• The humidity sensor (TH3) value is less than 63%.
UP/ DOWN air flow
Flap swing Executes the command to the left.
Situations besides the ones described above Controls the level of the UP/DOWN flap.
LEFT/ RIGHT air flow
Louver swing Executes the command to the left.
Situations besides the ones described above Controls the front of the LEFT/RIGHT louver .
(c) High-pressure control
The outdoor heat exchager temperature sensor detection temperature controls the compressor.
OFF
ON or OFF
A
Outdoor air temperature 45ºC
Outdoor air temperature 45ºC
B
65 68
68 71
Outdoor heat exchager temperature
㧔
ºC
㧕
A B