Operation Flowcharts
SiE-05C
126
Troubleshooting Inverter K Series
∗
21
∗
18
∗
23
YES
YES
YES
YES
NO
NO
NO
NO
B
42 Hz
OFF
Flow rate control
ON
H
ON
86 Hz
ON
Open
OFF
OFF
OFF
ON
38 Hz
ON
OFF
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 and
protective control
ON/OFF by PI and
protective control
Flow rate control
ON/OFF by saturation
temperature
corresponding to
suction pressure
ON
H
ON
30~116 Hz by PI
control
∗
24
ON/OFF by PI
control
OFF
Heating operation
Start control in progress?
Defrosting
operation in progress?
Oil equalization in progress?
Compressor
protection operation
in progress?
(VF028)
K1M
INV
K2M
Y1E
Y2S
Y3S
Y4S
Y1R
M1F
M2F
ON/OFF by discharge temperature protection control
ON
∗
18 Start control
60 second start control in order to prevent liquid back to the compressor.
∗
19 Compressor protection
1. Protection control is triggered when the cooling load is large and the saturation temperature
corresponding to suction pressure is high.
2. Protection control is triggered when secondary inverter current exceeds set current.
3. Protection control is triggered by discharge temperature.
4. Protection control is triggered when saturation temperature corresponding to suction pressure is
low.
SI-05C.BOOK Page 126 Monday, November 6, 2000 4:13 PM
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