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SENS IQ Technical Manual
Service hotline: 1.800.742.2326
1.303.678.7500
against nuisance trips. If over voltage is caused by an external source the charger will not execute an Over Volt-
age Shutdown. If an over voltage condition persists for 30 seconds, and the charger itself is the cause, the charger
will latch off. It remains off until AC power is shut down long enough to operate the AC Fail alarm relay, which
resets the latched condition. This setting is prevented from being set less than the High DC alarm setting.
5.
DC BREAKER OPEN
- Indicates the DC breaker is open. Activates red CHARGER ALARM LED and red
CHARGER DC BREAKER LED. Optional Alarm Relay Printed Circuit Board relay K1 changes to Fail state.
6.
CHARGER FAIL
- Indicates the charger is not providing the current demanded by the load. This is caused by
an open DC output breaker or an internal component failure. Activates red CHARGER ALARM LED and red
CHARGER DC BREAKER LED. Summary relay changes to Fail state. Optional Alarm Relay Printed Circuit
Board relay K1 changes to Fail state.
7.
CHARGER OVER TEMPERATURE
- Indicates charger temperature is above designed operating temperature
range. Activates yellow CHARGER LED. Will not activate the Summary relay.
8.
POSITIVE GROUND FAULT
- Indicates leakage current from the charger positive output to ground. Activates
yellow DC SYSTEM ALARM LED. Summary relay changes to Fail state. Optional Alarm Relay Printed Circuit
Board relay K4 changes to Fail state.
9.
NEGATIVE GROUND FAULT -
Indicates leakage current from the charger negative output to ground. Acti-
vates yellow DC SYSTEM ALARM LED. Summary relay changes to Fail state. Optional Alarm Relay Printed
Circuit Board relay K4 changes to Fail state.
10.
BATTERY CHECK PASS/FAIL
- Indicates whether the Battery Check test passed or failed, meaning whether
or not the battery supported the load (see Section 8.
4
). A failure activates red BATT CHCK LED, DC SYSTEM
ALARM LED and red BATTERY LED. Summary relay changes to Fail state. Optional Alarm Relay Printed
Circuit Board relay K5 changes to Fail state. Press the front panel ENTER/BACK button twice to remove/turn off
a red BATT CHCK LED after a Battery Check failure. LED will remain blank until another Battery Check test is
engaged. A tripped Battery Check relay, either Summary or individual relay, cannot be reset until a new Battery
Check test successfully passes or until Battery Check is disabled. Upon a failure the audible alarm will sound for
25 seconds, however pressing the front panel ENTER/BACK key before the 25 second timeout will shut off the
audible alarm.
11.
BATTERY END-OF-DISCHARGE
- Indicates battery should not be discharged any further and load should be
dropped. Activates red DC SYSTEM ALARM LED and yellow DC VOLTS LED. Summary relay changes to
Fail state. Optional Alarm Relay Printed Circuit Board relay K7 changes to Fail state.
12.
BATTERY DISCHARGING
- Indicates battery voltage is below a programmed level. Activates yellow DC
SYSTEM ALARM LED. Will not activate the Summary relay.
13.
AC FAIL
- Indicates AC input voltage is not applied or is below 80% of nominal line voltage. Activates red AC
INPUT LED. Summary relay changes to Fail state. Optional Alarm Relay Printed Circuit Board relay K2 chang-
es to Fail state.
14.
AC OUT-OF-SPEC
- Indicates AC input voltage is outside of suggested operating range. Low line alarm is trig-
gered at 88% of nominal AC voltage for input codes "3" and "8" and at 84% for input codes "P", "T", "4", "S" and
"V". High line alarm is triggered at 110% of nominal AC voltage for all models. Activates yellow AC INPUT
LED. Will not activate the Summary relay.
15.
LOW CURRENT -
Indicates low output current being drawn from charger. Will not activate any LEDs or Sum-
mary relay.
