Mitsubishi Heavy Industries FDCW100VNX-A, Technical Manual

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Service
- 179 -
‘19 • HM-T-340
Compressor soft start control
＜ FDCW60VNX ＞
1) The pattern 1
Normally, the outdoor unit starts a compressor with this control except the condition mentioned in (2) pattern 2.
・
Firstly, compressor starts at 10rps up to the target speed "30rps", and it is acceralated by 5rps/s.
・
Compressor acceleration
・
The compressor upper limit speed is limited at "A", "B", and "C" rps for "T minutes after compressor starts"
respectively.
Duration from the starting compressor T (min)
T
≦
3min T
≦
7min T
≦
9min T
＞
9min
A rps B rps C rps
FDCW60VNX
Cooling mode 120 120 120 -
Heating mode
Tho-A
≧
0
℃
120 120 120 -
Tho-A
＜
0
℃
48 56 75 -
“When the value in this table is higher than the global highest (Nmaxo) value,
it follows the global highest value.”
In case the pattern 1 condition and the pattern 3 condition are fulfi lled at the same time, pattern 3 start-up will be done.
2) The pattern 2
①
Control condition
Operation mode is “Heating” and all below condition a) and b) are fullfi lled.
but any of 1) ~3) conditions is fulfi lled, pattern 1 start-up will be done.
1) Operation mode is changed from “stop” to “Heating”
2) Restarting compressor after Defrost operation.
3) Restart from “Forced-Stop”
a) “Compressor Command” is turned from “OFF” to “ON”
b) When “Compressor commnad” is turned “ON”, Tho-A is less than 10 degree C.
Duration from the starting compressor T (min)
T
≦
1min T
≦
5min T
≦
5min
A rps B rps C rps
FDCW60VNX Heating mode 40 32 -
3) The pattern 3
①
Control condition
In case all of the following conditions are fulfi lled when the operation mode is not "Stop"
i) Inverter command changes from "STOP" to "RUN".
ii) Taqrget compressor speed is less than A rps.
②
Control contents
Compressor lower speed limit is limited at A rps for "a" minites.
Mode A rps a min
FDCW60VNX
Cooling 40 3
Heating 40 3
If the operation is duplicate the pattern 2 and the pattern 3, the pattern 2 execution is priority.
Operation control function by the outdoor unit control