Instruction Manual
IM01005031E - Rev.6
Effective January 2019
Eaton SPD Series for Mounting External
to Electrical Distribution Equipment
Condition
Probable Cause
Solution
Green LEDs ON (1 per phase) and one Green LED ON for
Neu/Gnd Protection
Normal operation
N/A.
Audible Alarm OFF, Form C (N.C.) contact in the CLOSED
state
Normal operation
N/A.
Phase Green LED is OFF, same Phase Red LED is ON,
Audible Alarm is ON
Phase protection compromised or lost
Extended Temporary Overvoltage (TOV)
Significant surge event
Replace SPD
Check electrical system for TOV sources, correct, replace SPD
Replace SPD
Neu/Gnd Green LED is OFF, Neu/Gnd Red LED is ON,
Audible Alarm is ON (for models with Neutral connections)
Neu/Gnd protection is compromised or lost
Significant surge event
Replace SPD
Replace SPD
All phase Green LEDs OFF, all phase RED LEDs ON, Audible
Alarm is ON
All phase protection is compromised or lost
SPD rated voltage is less than system voltage
Extended Temporary Overvoltage (TOV)
Significant surge event
Replace SPD
Replace SPD with correct voltage model
Check electrical system for TOV sources, correct, replace SPD
Replace SPD
One of the display Red LEDs is ON. Audible Alarm is OFF
Audible Alarm Silence button has been
depressed and Alarm is silenced
Normal operation
If power is cycled and a fault condition still exists, the Audible
Alarm will reactivate
All Green and Red LEDs are OFF, LCD display (on Surge
Counter models) is OFF
SPD is not connected to a power source
Check system voltage at SPD connection
Check SPD connections
4.0 Troubleshooting
Many SPD failures result from improper installation. Once the
SPD is installed properly, it is a highly reliable unit.
If the SPD does not function properly, first confirm that it is
installed properly. See Section 2, “
Installation.
”
If the SPD malfunctions after it has been operating routinely,
refer to Table 2,
Troubleshooting Chart
. This Troubleshooting
Chart identifies possible causes and solutions to the malfunc-
tion. Further assistance may be obtained by calling Eaton’s
Applications Engineers, at 1-800-809-2772, option 4, sub-option
2, including being directed to the warranty process if applicable.
Table 2. Troubleshooting Chart
