"SS90" WPS MODELS A & B TROUBLESHOOTING GUIDE
Verify that desired options are available on unit before troubleshooting. Refer to electrical connection information and the
maintenance and service page of this manual for fuse locations. Troubleshooting shall be performed by factory authorized
personnel only. Service and/or installation by unauthorized personnel shall void warranty. Review the following guide prior
to requesting technical support. If technical support is required, unit serial number (found on front of manual and inside
unit), as well as distributor who supplied unit must be supplied.
POSSIBLE TROUBLE
A) Primary power source turned off.
B) Loose connection on TB3 or WPS board
C) Incorrect polarity on D.C. unit
D) Incorrect power source applied. Verify voltage
and check fuses F1 & F2 of both circuit boards.
A) N/C Alarm loop is not connected properly to TB1.
Remove wires from TB1, 1 & 2. Continuity test on wires
should be zero ohms (short) back to initiating device. Place
smoke detector in alarm and verify that dry contacts open on
alarm.
B) Unit is detecting down limit (Model B only). If Down
Limit feature is not being used, jumper must remain in TB1,
6 & 7.
C) Load on release mechanism exceeds 40lbs. Remove sash
chain and test with manual test button for proper release.
D) Damaged unit. Call tech support.
A) Motor control voltage not connected to TB2
B) Motor control is D.C.. Check polarity.
C) Control voltage is above 30V. Check Model B
circuit board fuse F2.
A) Test button is not being depressed long enough. Depress
button continuously for the 10 second delay. Unit must be
powered up for a minimum of 15 seconds before testing.
B) Unit is detecting down limit (Model B only) Make sure
Aux. down limit is connected properly. If N/O down limit is
used, N/C loop (TB1-6&7) must have jumper installed.
C) Possible defective switch. Call tech support.
A) Incorrect power applied. Check unit label. Measure
supply voltage.
B) Unit has sustained damage from transient voltage. Call
tech support.
SYMPTOM
1. Red Power LED does not light.
2. Red LED is on, but unit does not release door after
alarm or power loss delay.
3. Amber Disable LED does not light (Model B)
4. Red LED is on, unit does not respond to manual test
button, but works in alarm.
5) Unit blows fuse when power is applied
UNIT SERIAL NUMBER___________________ DISTRIBUTOR___________________
TECHNICAL SUPPORT (570) 455-0577 9AM - 5PM EST MON-FRI
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