Panasonic U-8ME1E8E Service Manual page 17

3. Compressor Control
3-7-2. Overcurrent protection of compressor
Current limitation of compressor is shown in the table below. This limitation is to protect the compressor, so that
the current of the power cable connected with the compressor is limited.
* For the inverter compressor, this is the secondary current from HIC board.
Limit current 2
1
Max. current 2 H
Max. current 2 L
Limit current 2
Max. current 2 L
Max. current 2 H
3-7-3. Primary current protection of HIC board
The fan motor current is included in primary current. PCB is protected from the power consumption increase of
fan motor when the heat exchanger is blocked by frost etc.
Limit current 1
Max. current 1 H
Max. current 1 L
Limit current 1
Max. current 1 L
Max. current 1 H
*When restarting after stopping by protection control, the compressor capacity will increase slowly.
Reference Invertor layout sketch
Power Source
Inverter 6 HP Inverter 10 HP
18.0
15.5
15.0
Stop If this current is detected at regular intervals, alarm appears.
Inverter compressor Hz goes down
Inverter compressor Hz cannot increase
Inverter compressor Hz can increase
Inverter 6 HP Inverter 10 HP
18.0
15.0
14.5
If this current is detected at regular intervals, alarm appears.
Stop
Inverter compressor Hz goes down
H
Inverter compressor Hz cannot increase
L
Inverter compressor Hz can increase
Noise Filter Magnet SW
L1
L2
L3
Primary CT
Constant speed 5 HP
21.0 13.6
18.5 -
18.0 -
23.0
20.0
19.5
Diode Bridge Noise Filter
1 - 10
2WAY SYSTEM
Control Functions - Outdoor Unit
Constant speed 6HP
15.7
-
-
Secondary CT
IPM(CM)
U
Compressor
V
W
IPM(FN)
U
Fan Motor
V
W