Cut Sheet

Page 25
SE-330HV Neutral-Grounding-Resistor Monitor Rev. 5-I-091115
5. TROUBLESHOOTING
P
ROBLEM DIAGNOSTIC LED
FLASH CODE
(1)
SOLUTION
POWER LED off. Check if supply voltage is present on terminals 1 and 2. If present,
an overvoltage may have caused the power supply to shutdown.
Cycle supply voltage. If POWER LED remains off, return unit for
repair.
POWER LED flashes. A power-supply overload has occurred. Cycle supply voltage. If
problem persists, consult Littelfuse Startco.
Calibration-Error Trip
DIAGNOSTIC LED flash code
1 L - 1 S - 1 L The total resistance of the NGR and sensing-resistor circuit is
outside the calibration range. Verify that switch S5 is set to match
the resistance of the sensing resistor, check the resistance of the
NGR, and verify the sensing-resistor circuit. See Section 9.2 for
sensing-resistor tests.
Repeat the calibration procedure after the open or shorted condition
has been corrected.
GF LED
(2)
: No Change, RF LED
(2)
: ON, K1:Trip
Remote Trip
DIAGNOSTIC LED flash code
1 L - 2 S - 1 L The SE-330HV was tripped by a signal from network
communications. Press RESET to clear the trip.
GF LED
(2)
: ON, RF LED
(2)
: ON, K1:Trip
A/D-Converter-Error Trip
DIAGNOSTIC LED flash code
1 L - 4 S - 1 L An A/D-converter error was detected. Press RESET to clear the
trip. If the problem persists, consult Littelfuse Startco.
GF LED
(2)
: No Change, RF LED
(2)
: ON, K1:Trip
SD Card
DIAGNOSTIC LED flash code
1 L - 5 S - 1 L SD Card is full or a write error occurred. Delete files or use a
different microSD™ card.
GF LED
(2)
: No Change, RF LED
(2)
: No Change, K1:No Change
If this diagnostic was caused during an attempt to upgrade the
firmware, follow this alternate process:
- remove supply from SE-330HV
- insert a microSD card containing the firmware upgrade file in the
root directory of the SD card
- power on the SE-330HV
- set switch S8 to UPGRADE within 30 s
- the upgrade should continue as described in Section 4.1.2
Watchdog Trip
DIAGNOSTIC LED flash code
1 L - 6 S - 1 L A watchdog trip results in a processor reset. During reset, UNIT
HEALTHY relay K4 will be de-energized. After a reset, UNIT
HEALTHY relay K4 will be energized. Press RESET to clear the
trip. If the problem persists, consult Littelfuse Startco.
GF LED
(2)
: ON, RF LED
(2)
: ON, K1:Trip
CPU Trip
DIAGNOSTIC LED flash code
1 L - 7 S - 1 L The CPU has detected a system fault. Press RESET to clear the
trip.
GF LED
(2)
: ON, RF LED
(2)
: ON, K1:Trip
Non-Volatile Memory Error Trip
DIAGNOSTIC LED flash code
1 L - 8 S - 1 L An error was detected in the Non-Volatile Memory. Press RESET
to clear the trip. If the problem persists, consult Littelfuse Startco.
GF LED
(2)
: ON, RF LED
(2)
: ON, K1:Trip
SD Upgrade Error
DIAGNOSTIC LED flash code
1 L - 9 S - 1 L An error occurred during the flash-memory upgrade procedure.
Ensure that the firmware upgrade file is correct or use a different
microSD™ card.
GF LED
(2)
: No Change, RF LED
(2)
: No Change, K1:No Change
DIAGNOSTIC LED = Solid Red SE-330HV processor failed to start. Cycle supply. If problem
persists, consult Littelfuse Startco. K1: De-energized.
Pressing RESET does not clear trips. Trip condition is still present. Locate and correct.
The RESET button is disabled if remote-reset terminals 15 and 16
are connected. Replace shorted remote-reset switch or issue Reset
command from the communications network.
UNIT HEALTHY relay K4 momentarily
changes state.
Occurs when processor is reset.