Daikin VRV Inverter K Series Manual page 140

SI-05C.BOOK Page 126 Monday, November 6, 2000 4:13 PM
Operation Flowcharts
∗21
∗18 Start control
∗19 Compressor protection
126
Heating operation
∗18
Start control in progress?
NO
Defrosting
operation in progress?
NO
∗23
Oil equalization in progress?
NO
Compressor
protection operation
in progress?
NO
Inverter compressor magnetic
contactor K1M
30~116 Hz by PI
Inverter output frequency
control ∗24
INV
ON/OFF by PI
Standard compressor
magnetic contactor control
K2M
Electronic expansion valve Y1E
Solenoid valve (hot gas)
OFF
Y2S
Solenoid valve (injection) Y3S
Y4S
4-way valve Y1R
Fan
M1F
Fan
M2F
60 second start control in order to prevent liquid back to the compressor.
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.
YES
YES
YES
YES
ON
30~116 Hz by PI and
38 Hz 86 Hz
protective control
ON/OFF by PI and
ON
protective control
Flow rate control Open
ON/OFF by saturation
temperature
OFF
corresponding to
suction pressure
ON/OFF by discharge temperature protection control
ON OFF
H OFF
ON OFF
B
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Troubleshooting Inverter K Series
SiE-05C
42 Hz
ON OFF
Flow rate control
ON
ON
H
ON
(VF028)