Elektronika SCM60ZD-S Manual page 41

(l) Low rps continuous operation protection control
The following controls are performed to return oil to the compressor when the decision speed other than 0 rps and 20 rps or
less is continuously operated for 8 minutes.
(i) The decision speed is forced to operate at 30 rps for 30 seconds.
(ii) If there is a decision exceeding 30 rps during this forced 30 rps operation, this control ends and the operation follows that
decision.
(m) Refrigerant oil recovery control
If the all of the indoor units are not operate at the same time for some extended period, the cooling or heating performance
may temporarily decrease. This is in order to control the recovery of the refrigerant oil in the stopped indoor unit.
(i) This control is performed when all of the following conditions have been satisfied.
1) Operating mode : Cooling or heating.
2) When 240 minutes of cumulative operating time has passed after the power is turned on, and after refrigerant oil
recover control is completed, of after operation for all rooms in the same mode is completed.
(ii) Description of control
Compressor
minimum rps
0rps
470 (fully opened)
EEV
(Operating unit)
0 (fully closed)
470 (fully opened)
EEV
(Stopped unit)
0 (fully closed)
Me
Outdoor-unit
fan
0rpm
Start of control
[Cooling]
30rps
60sec. 120sec. 60sec.
[Heating]
30rps
0rps
470 (fully opened)
0 (fully closed)
470 (fully opened)
Heating stop
Unit control
0 (fully closed)
Me
0rpm
60sec. 120sec.
Start of control
60sec.
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