Simplex 900 Series User Manual

[Note: Do not force at any time.
If a wrong combination is entered while operating the lock, turn the outside thumbturn to the left
(counterclockwise) to the stop position and release. This will clear any previously depressed buttons. Enter in
the correct combination. ]
Troubleshooting
Symptom/problem: Turning outside thumbturn clockwise always retracts
latch without depressing any buttons.
Cause: Lock is in zero combination.
Solution: Follow the procedure for setting a new combination except omit step 3.

Simplex 900 Series Specifications

General

Key Override	Optional
Door Thickness	1-3/4" to 2-1/4"
Backset	2-3/4"
Number of Codes	Not applicable
Code Length	Not applicable
Finishes	Satin chrome
Operating Temperature	-4°F to 150°F (-20°C to 66°C)