Panasonic U-8MF2E8 Service Manual page 39

8. Oil Control
8-6. Oil Rotation Control
The oil rotation control system regularly exchanges oil among the outdoor units regardless of oil level.
Oil rotation control is performed every one hour with accumulated operation time among the connected multiple
outdoor units only.
During oil rotation control, ORVR may open in the order of priority of outdoor unit inverter compressor operation
every 5 minutes.
8-7. Indoor Unit Self Oil Recovery Control
The indoor unit self oil recovery control system can only be performed by the cooling indoor units.
Divided into 8 groups in the order of indoor unit addresses and this oil recovery control is performed every
190 minutes with accumulated operation time per each group for 1 minute.
The indoor unit expansion valve is opened according to the values determined by the indoor unit capacity with
thermostat OFF.
10 pulses is opened from the pulse controlling the indoor unit expansion valve with thermostat ON.
Then, the fan speed is changed to L.
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3WAY SYSTEM
Control Functions
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