No.
Failure item
System
default
operation
Failure definition
Solutions
Remarks
cabinet door is
opened during
operation, the
system will stop
immediately.
43
Air Filter
Clogged
Alarm
Comparison with the set
value of the internal
cabinet air pressure:
Punder< Pset
－
25pa
1. Check if the air filter is
clogged.
2. Check whether the air
pressure sensor works
normally
The reason
might be the
clogging of the
air filter
44
Cooling Fan
Abnormal
Alarm
Cooling fan motor winding
overheat
The normally-closed
contact will be opened,
indicating this abnormal.
1. Check whether the fan
rotates in reverse direction.
2. Check whether the fan is
blocked.
System
operation is
configurable
45
Fan Internal
Power Loss
Alarm
When the power of the
cooling fan has a failure,
the normally-closed
contact of the fan breaker
will be opened
1. Check the fan breaker.
2. Check whether the power
supply circuit is normal.
System
operation is
configurable
46
Cooling Fan
Failure
Alarm
The fan breaker is tripped
or fan interior thermal
relay is opened.
1.Check the fan breaker.
2.Check if the thermal relay is
opened, and if the fan is
blocked.
47
Transformer
Over
Temperature
Alarm
Alarm
The failure information
will be reported when the
temperature of the
transformer exceeds
95°C
1. Check whether the ambient
temperature is too high.
2. Check whether the cooling
fans on the top of the
transformer work normally.
3. Check whether the air filter is
clogged.
4. Check whether the MVD is in
overload operation for a long
time.
5. Check whether the
temperature sensor is in good
condition..
48
Transformer
Over
Temperature
Fault
Trip
The failure information
will be reported when the
temperature of the
transformer exceeds
110°C
The items to be checked are
the same as above.
49
Transformer
Temperature
Sensor Loss
Alarm
The three PT100 thermal
resistors of transformer
winding A, B and C are
connected to the PT
1. Check if the wiring is firmly
connected.
2. Check if the PT100 resistor
is damaged.
System
operation is
configurable
Summary of Contents for MVF2000 Series
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