Delta Electronics MVF2000 Series, Product Manual

Page: 109 / 136

105
No. Failure item
System
default
operation
Failure definition Solutions Remarks
37
Internal Control
Power Loss
Alarm
The backup control power
provided by the
phase-shift transformer
auxiliary winding is lost
1. Check the wiring and voltage
of the backup control power.
2. Check whether the
corresponding switches are
closed and whether the
corresponding relays work
normally.
38
External/Custom
er Control Power
Loss
Alarm
The control power
provided by the user is
lost
1. Check the wiring and voltage
of the external control power.
2. Check whether the
corresponding switches are
closed and whether the
corresponding relays work
normally.
39
Control Power
Loss Overtime
Trip
Both control power from
the user’s line and from
the phase-shift
transformer are lost
simultaneously over
30min.
1. Check the wiring and voltage
of external control power.
2. Check the wiring and voltage
of the internal backup control
power.
3. Check whether the
corresponding switches are
closed and whether the
corresponding relays work
normally.
40
UPS Under
Voltage
Alarm
The failure information
will be reported when the
battery voltage is low.
1. Check if the battery voltage
is above 12V each.
2. Check the switch mode
power supply module output
voltage is 26V
41
UPS Under
Voltage
Overtime
Trip
After control power from
the user’s line and from
the phase-shift
transformer are lost
，
UPS under voltage occur
over 1min.
1. Check the wiring and voltage
of external control power.
2. Check the wiring and voltage
of the internal backup control
power.
3. Check whether the
corresponding switches are
closed and whether the
corresponding relays work
normally.
4. Find the reasons for UPS
failure and restore the power
supply as soon as possible.
42
HV Cabinet Door
Open
Trip
MVD high voltage cabinet
door is open
1 Check the state of the MVD
cabinet doors.
2 Check the position switch of
the cabinet door and its
contacts.
If the cabinet
door is open
before the high
voltage
power-on, the
closing allowed
signal cannot be
sent. If the