Outline of Control PACD011001C2
434 Function UM Combination “MA1R Series” Using R-407C
3.1.10 Oil Return Operation
Activates the oil return operation to collect refrigerant oil from the field pipes when the following conditions
are met.
[Start conditions]
1. When cumulative compressor operating time from power ON exceeds 2 hours
2. When cumulative compressor operating time from completion of previous return operation exceeds 8
hours.
However, when the upper-limit frequency is limited to less than “A” Hz during the previous oil return
operation, the above time period of 8 hours is changed to 4 hours.
∗
1)When defrost control operation for more than 4 minutes with inverter compressor frequency of “A”Hz or
higher, oil return time reset to 8 hours.
2) When condition 1. or 2. is satisfied during heating operation, the electric heaters of indoor units are
turned off 2 minutes prior in order to prepare for the oil return operation.
3) The oil return operation is not activated for 28 minutes after the completion of the previous defrosting
operation.
[Oil return operation]
„
The compressor operating frequency is set to “B” Hz shown in the following table.
[Ending conditions]
„
The oil return operation ends after 1~8 minutes of operation. However, when the compressor stop
conditions are met during an oil return operation, the compressor stops after the completion of the oil
return operation.
When the compressor stops during an oil return preparation operation, the oil return operation is
activated at the next startup.
AB
INV STD1 STD2 INV STD1 STD2
PA-16MA1XPK 33Hz ON — 52Hz ON —
PA-18MA1XPK 41Hz ON — 71Hz ON —
PA-20MA1XPK 41Hz ON — 71Hz ON —
PA-24MA1XPK 75Hz ON OFF 52Hz ON ON
PA-26·28·30MA1XPK 75Hz ON OFF 52Hz ON ON
To Next Page
Loading...
