Troubleshooting - janitza SVG Series User Manual

9.

Troubleshooting

Malfunctions due to user errors:
• Incorrect connection of the CT cable or incorrect parameter setting. These faults can
be detected by the user through careful observation of the data at the interface on the
monitor.
• If the compensation appears to have little effect and there is no warning notice, contact
a Janitza service technician;
• If the LCD screen displays an alarm message, contact a Janitza service technician;
• If the device shows no reaction on starting, contact a Janitza service technician;
Figure 5-1 Troubleshooting
No. Fault and alarm
1 Communication
error
2 Overtemperature
3 Input voltage is
not in the normal
range
4 Input frequency is
not in the normal
range
5 Bus overvoltage
6 Error on the
emergency power
supply (UPS)
7 No compensation
current
8 Fuse tripped
9 Setup of the
controller
parameters
10 Inverter
overloaded
11 Fan fault
12 Error in setting the
CT ratio
Possible cause
Communication error between monitor
and SVG module
– Ambient temperature is too high
– Air inlet is blocked
– Fan fault
– Wiring of the power supply line is not correct
(3-phase and 3-conductor/ 3-phase and 4-con-
ductor)
– Input voltage is overloaded or underloaded
– Inverter is not functioning or is disabled
Inverter is disabled or not functioning,
because the input frequency exceeds the
limits
Overvoltage
Internal UPS error
– SVG not switched on
– Problem with CT installation and wiring
– Compensation rate too low
At least one input fuse has an open circuit
The controller parameters read out and the
set controller parameters do not match
Compensation current of the SVG exceeds
the rated current
Defective fan
Error in setting the external CT (current
transformer) ratio
SVG 50/100
Solution
Check to be sure the communication
cable is properly connected.
– Troubleshooting is carried out step by step
Check to see whether:
– the module is connected correctly
– the power supply line is connected correctly
– the input phase voltage is within the range of
132 V to 264 V
Check whether the frequency of the
AC input is in the range of 40.5 to 62.5
Hz
Contact your Janitza service technician
Contact your Janitza service technician
Check:
– whether the SVG is switched on
– the setting of the compensation rate, the
CT position and wiring, and whether the CT
cable is securely connected
Contact your Janitza service technician
Contact your Janitza service technician
Check whether the capacity of the
SVG
suits the load
Contact your Janitza service technician
Check whether the installation
direction of the CT and the phase
sequence are correct
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