P/N: 1176718
REV: 02/17/2021
Page
25
of
32
SYMPTOMS
POSSIBLE CAUSES
RECOMMENDED SOLUTIONS
Class 2 protection module
Output Failure indicators; 4
illuminated red
Input protection circuit
activated due to low-voltage
input at Class 2 protection
module (Input Status indicator
flashing green)
Input voltage to Class 2
protection module has dropped
below 21V. Resolve low-voltage
issue with main power supply
unit. Once issue has been
resolved, press ON/OFF-Reset
push button on Class 2
protection module for more
than 1 second to reset input
protection circuit. Alternatively,
apply a 24VDC signal to the
ON/OFF-Reset input on
terminals 11 and 12 of the Class
2 protection module for more
than one second.
Class 2 protection module
Output Failure indicators; 4
illuminated red
Output turned off at Class 2
protection module (Input Status
Indicator illuminated green)
Press ON/OFF-Reset push button
on Class 2 protection module for
less than 1 second to turn on
Class 2 outputs. Alternatively,
apply a 24VDC signal to the
ON/OFF-Reset input on
terminals 11 and 12 of the Class
2 protection module for less
than one second.
Class 2 protection module
Output Failure indicators; 1
and 4, as well as 2 and 3,
alternately flashing red
Internal error in Class 2
protection module
Press ON/OFF-Reset push button
on Class 2 protection module for
more than 1 second to reset
input protection circuit.
Alternatively, apply a 24VDC
signal to the ON/OFF-Reset input
on terminals 11 and 12 of the
Class 2 protection module for
more than one second. If Class 2
protection module cannot be
reset, replace it with a new
module.
