Effective December 2020
22 Eaton www.eaton.com
Eaton SPD Series for mounting external
to electrical distribution equipment
Instruction Manual IM01005031E - rev. 7
8.0 Troubleshooting
Troubleshooting feature packages 1, 2, and 3
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 4, 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 or email SPD@eaton.
com, including being directed to the warranty process if appli-
cable.
Table 4. Troubleshooting chart
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. Replace SPD.
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.
One phase has neither a green or red LED lit. Ribbon cable is not connected properly. Ribbon cable is
mis-aligned with connector.
Verify ribbon cable and connector are properly aligned
and fully seated together.
All phase LEDs are green, audible alarm is on. Insufficient voltage to the power supply. Replace SPD.
To Next Page
Need help?
General
