DC/AC Inverter
INV222 & INV211
User Manual
Page 13 (20)
©2014. ELTEK DEUTSCHLAND GmbH.
Eltek_UM_INV222_and_INV211_E_R2.0.doc
5.4 Internal monitoring
Monitored values/operating conditions
Monitored values
Criteria
Function
DC input voltage
Input voltage out of the range of factory set input
voltage range V
IMIN
* and V
IMAX
*
1.)
At V
IMIN
: Module switches
off and on automatically
with delay and hysteresis
2.)
At V
IMAX
: Immediate switch-
off
AC output voltage
Output voltage out of the specified range of Vo< and
Vo>
INV222: Vo< = 190 V (INV211: 95 V)
INV222: Vo> = 253 V (INV211: 127 V)
1.)
At Vo<: Simply a warning
signal is generated
2.)
At Vo>: Module switches
off automatically. The
module must be restarted
manually
Short circuit
Io>130 % Inom (9.8 A)
Module automatically switches off
after three seconds. The module
tries to self-restart automatically
for three times. If this fails, the
module switches off and must be
restarted manually
Overload
Io>Inom (9.8 A)
Po>Pnom (1.8 kW/2.25 kVA or 0.9 kW/1.125 kVA,
dependent on the type)
Module switches off after 10 sec-
onds automatically. The module
must be restarted manually.
Temperature
Internal temperature higher than
specified value*
Automatic switch-off at high over
temperature and switch-on with
hysteresis
Fan speed
N< 500 min
-1
Automatic switch-off
*
see specific technical data section (
section 8
)
6. Maintenance
In general, the module is maintenance-free. Exclusively the fan is a component consisting of moving parts. Alt-
hough it may be expected that the operating life of the fan is more than five years it is recommended to exchange
the fan every five years.
By way of precaution a yearly inspection with following checks is recommended:
•
Mechanical/visual inspection
•
Removal of dust and dirt, especially on radiator surfaces
•
Check for internal dust or humidity
Attention!
Dust combined with moisture or water may influence or destroy the internal electronic circuits.
Dust inside the unit can be blown out with dry compressed air. Avoid using too high air pressure.
The interval between the checks depends on ambient conditions of the installed module.