Primary Switch Mode Inverter
UNV-F
Operation Manual
Page 14 (28)
BHB.UNV-F.D65-1050.HB101
The red LED "Ui>" signalizes inverter input voltage high
(voltage is higher than adjusted threshold Ui>)
The inverter switches off without delay time (protection
against overvoltage). The inverter switches on again if the
input voltage is lower than adjusted switch off threshold.
6.3.2 Output voltage monitoring
The inverter output voltage is transmitted to the control unit
by a voltage transformer and is compared to internally ad-
justed values.
If there is a correct output voltage the green LED "Uo O.K."
is on. If the output voltage is lower than the adjusted
threshold (e.g. high overload or short circuit), the inverter
switches off with a delay time of 2.5 sec. After 15 sec follows
an automatic restart.
The red LED Error is on. The inverter is continuously short
circuit proof.
6.3.3 Monitoring of Overheating
Signal "T>" ( red LED ) ; if the internal temperature of the
inverter is higher than the adjusted threshold. High ambient
temperature, poor cooling , permanent overload (appr. 20-
25%) or a defective fan can cause overheating of the unit.
The inverter switches off with an adjustable delay time. The
inverter switches on again if the temperature is lower than
the adjusted switch on threshold. Additionally, the fan volt-
age and current characteristic is monitored to detect a defec-
tive fan. This is indicated by a blinking LED T> .
6.3.4 Signals
All operation modes and error-states are indicated by LED s
situated on the front panel. The collective failure signal is
available by an isolated relay contact on connector X1.
Max. contact load: 60V DC / 1A, 110V DC / 0.45A.
In case of failure the contacts COM and NO are closed.
6.3.5 Adjustment of output parameters and
monitoring thresholds
The adjustment of output parameters and monitoring thresh-
olds is easy. The values can be adjusted with the two front-
keys by displaying the actual value.
The inverter offers two adjustment menus:
