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Optional Function
4.3.12 Outdoor Fan Motor Intermitted Operation Setting
Press “PSW3” and set the Outdoor Fan Motor Intermitted Operation Setting “ ” (auxiliary function) to protect the outdoor
fan motor from snow. Set this function to the PCB of the outdoor unit set as the main outdoor unit. All the outdoor fan motors
start intermitted operation
(
t1/600s). This function is available only during the input control function No.4 is valid. If the
compressor restarts operating, the outdoor fan motors will be restored to normal operation.
Fan Motor Operation
t1 [s]
Fan Motor Stop
600 [s]
Setting Condition Operating time of outdoor fan t1(s)
0 Continuous operation(600s)
1 30
2 60
3 120
4 300
NOTE:
1. This is an auxiliary function to protect the unit from snow. In snowy regions, make sure to protect the unit with a snow-
prevention roof, fence or snow-prevention hood (Field-Supplied), etc.. Otherwise, abnormal vibrations due to imbalanced
propeller fan will be caused.
2. If the fan motor or fan controller fail during the outdoor fan motor start/stop operation, stop all the outdoor fan motor to
suspend the operation. Check the alarm code and deal properly with the failure next time the compressor is operated.
Because of this setting, the outdoor fan can operate even while the outdoor unit (compressor)
stops. Display a notice to that eect on a readily visible part of the unit body, in order to
avoid injuries caused by an unintended outdoor fan operation.
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