Panasonic Urban Multi MX1R Series Service Manual page 352

PACD011001C2
Troubleshooting Urban Multi "MX1R, ME1R Series" Using R-407C
Cooling operation
∗18
Start control in progress?
Oil equalization in progress?
∗19
protection operation
∗22
Low temperature
protection operation in
Inverter compressor magnetic
K1M
contactor
Inverter output frequency 30~116 Hz by PI
control ∗20
INV
ON/OFF by PI
Standard compressor
K2M control
magnetic contactor
Y1E
Electronic expansion
valve
Solenoid valve (hot gas)
Y2S
Solenoid valve (injection) Y3S
∗21
Y4S
4-way valve Y1R
Fan M1F
Fan M2F
YES
NO
YES
NO
Compressor
YES
in progress?
NO
YES
progress?
NO
30~116 Hz
OFF
ON/OFF by
saturation
OFF
temperature
corresponding to
suction pressure
ON/OFF by discharge temperature protection control
H
∗22
ON
B
Operation Flowcharts
ON
30~116 Hz by PI and
38 Hz
protective control
ON/OFF by PI and
ON
protective control
Open
OFF
OFF
H
ON
42 Hz
OFF
ON
ON
(M061)
331