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20
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(2) Indoor fan motor protection
When the air conditioner 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 lamp illuminates simultaneously and the operation lamp flashing 6 times at each 8-second.
(3) Dew condensation prevention control [Cooling (including automatic), cooling oriented dehumidifying operation)
◆ SRK50ZD-S
(a) Operating conditions: When the following conditions are met after 20 minutes or more of continuous operation after
operation starts.
1 The command speed is 28 rps or higher
2 The humidity sensor value is 68% or higher
(b) Operation Contents
(c) Reset Conditions: When either of the following conditions is satisfied.
1 The command speed is lower than 28 rps.
2 The humidity sensor value is less than 63%.
(4) Prevention of continuous low speed operation: For oil return to compressor
(a) Operating conditions: When command speed of less than 30(26) rps continues for 8(60) minutes
(b) Detail of operation: The unit is operated at command speed of 30 rps forcibly for 15 seconds. (The indoor and outdoor
fans are not changed.)
Notes (1) When the command of exceeding 30 rps is directed during 30 rps forced operation, the unit follows it.
Note (2) Values in ( ) are for Type 50.
(5) Compressor protection start
(a) When the indoor unit calculated speed is 64 rps or over at operation start, the unit is operated with 64 rps for 1 minute and 45
seconds. (All models) After that when the calculated speed is 96 rps or over, the unit is operated with 96 rps for 5 minutes
then moved to command speed. (50 type only)
(b) At thermo operation (OFF → ON) this control is not executed.
(c) The indoor unit fan corresponds to the command speed of each operation mode.
Note (1) When the calculated speed is less than 64 rps, the unit is started with low load starting described in article (6).
(6) Low load starting
(a) When the unit is started with calculated speed of less than 60(30) rps, it is operated with 60(30) rps for 80(60) seconds, then
the operation is moved to the command speed.
(b) The indoor fan corresponds to the operation mode.
Cooling: Speed corresponding to the command speed of air flow switching
Dehumidification: Speed decided in the operation region
Heating: The lower one between the speed corresponding to the command speed and the hot keep speed
Note (1) Values in ( ) are for Type 50.
Type
SRK50ZD-S
Item
Fan Speed Medium Indoor fan speed 4th speed
Fan Speed Low Indoor fan speed 4th speed
Other Settings Indoor fan speed Corresponding to command speed
Humidity (%)
68 73
50 rps
30 rps
Inverter command speed at upper limit
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