Mitsubishi Heavy Industries HMS140VA1 User Manual

Service
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151
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'13 • HM-T-193
6) Overcurrent protection
a) Current safe control I
When the inverter primary current (CT current) reaches following value, the compressor speed
is reduced until it gets to the cancellation value.
Model Operation Mode Current (A)
FDCW71VNX
Cooling 15
Heating 16
FDCW100VNX
Cooling 17
Heating 17
FDCW140VNX
Cooling 23
Heating 25
b)
Current safe control II
De
tecting the outdoor inverter output (secondary side) current, if the current values exceed setting values, the
compressor speed (frequency) is controlled in order to protect the inverter.
B
A
Reduce compressor speed
at every 1minute
Reset
Current (A)
Retention
12
14
16
18
20
22
24
5040 60 70 80 90 100 110 120 130
Control or reset valve (A)
Compressor speed (frequency) (rps)
(Fig. C) The control value “A” and the reset value vary depending
on the compressor speed.
Reset valve B
Control valve A
Model
Cooling Heating
Control
value A
Reset
value B
Control
value A
Reset
value B
FDCW71VNX 13 12 13 12
FDCW100VNX
Fig -C Fig -C Fig -C Fig -C
FDCW140VNX
7)
Power transistor temperature control
Thi
s control monitors the power transistor temperature (TIP) from the start operation of compressor, and when the
following condition is established, compressor speed (frequency) is controlled.
Power transistor temperature (°C)
Reset
Retention
Reduce compressor speed
at every 1 minute.
77
80
70
73
FDCW100VNX
81
85
FDCW71VNX
FDCW140VNX
8) Anomalous power transistor current
a) If the current value of power transistor exceeds the setting value, the compressor stops in order to prevent from
overcurrent of inverter.
b) Whe
n the current value of power transistor exceeds the specified value and compressor stops 4 times within 30
minutes, Inverter error is displayed and E42 is recorded in the Error Log. And it enters the anomalous stop mode.
9) Anomalous inverter PCB
If the power
transistor detects any anomaly for 15 minutes including the time of compressor stopping, Inverter error is
displayed and E51 is recorded in the Erro Log, and it enters the anomalous stop mode.
Operation control function by the outdoor unit control

Mitsubishi Heavy Industries HMS140VA1 Specifications

General

Brand	Mitsubishi Heavy Industries
Model	HMS140VA1
Category	Heat Pump
Language	English