Panasonic CU-8ME1XPK - Page 164

PACD011001C2 Operation Flowcharts
Troubleshooting Urban Multi “MX1, ME1 Series” Using R-22 143
∗21
∗18
∗22
YES
YES
YES
YES
NO
NO
NO
NO
∗19
B
Inverter compressor magnetic
contactor
Inverter output frequency
Standard compressor
magnetic contactor
Electronic expansion
valve
Solenoid valve (hot gas)
Solenoid valve (injection)
4-way valve
Fan
Fan
30~116 Hz by PI
control ∗20
ON/OFF by PI
control
OFF
H
ON
30~116 Hz
OFF
ON/OFF by
saturation
temperature
corresponding to
suction pressure
∗22
ON
30~116 Hz by PI and
protective control
ON/OFF by PI and
protective control
Open
38 Hz
ON
42 Hz
OFF
ON
ON
Cooling operation
Start control in progress?
Oil equalization in progress?
Compressor
protection operation
in progress?
Low temperature
protection operation in
progress?
(VF027)
K1M
INV
K2M
Y1E
Y2S
Y3S
Y4S
Y1R
M1F
M2F
ON/OFF by discharge temperature protection control
OFF
H
ON
OFF