Detex DS-1481 - Manual (Page 4)

INSTRUCTIONS FOR CHANGING
FAIL SECURE TO FAIL SAFE
AND VICE VERSA:
To change the Fail Secure into a Fail Safe, open the mechanism
side (as shown on the right) by removing the mechanism cover
screws (3 places) and the cover. Lift the solenoid and gently pull off the
solenoid plunger. Replace the BLUE colored spring with the RED colored
spring. Pull off the actuator cam, and flip it to use the cam profile for Fail
Safe (the side without an “X” mark). Before closing the unit, make sure that
the wires are properly seated on the wire channel (see figure on right).
Save the BLUE colored spring for future use.
For changing from Fail Safe to Fail Secure, just reverse the above
procedure.
Turn the actuator cam over
to utilize the Fail Safe
side of the cam profile.
Use the BLUE colored
solenoid spring.
You should have
the “X” mark
on top of the
actuator cam.
Fail Secure
Configuration
(Standard)
Use the RED colored
solenoid spring.
You should NOT
see the “X”
on top of the
actuator cam.
DO NOT OPEN
THIS SIDE.
Seat wires properly in
the housing channel so
the cover will seat flat.
Fail Safe
Configuration
TROUBLESHOOTING THE COMPLETED INSTALLATION
SYMPTOM: Electric release is not actuating:
1. Verify proper voltage is present AT STRIKE. If voltage
is present: the strike may have been affected during
the installation, or dirt or debris may be preventing
proper operation. Inspect electric release and clean.
DO NOT LUBRICATE SOLENOID.
2. If voltage IS NOT present:
Verify Circuit breaker is on
Verify voltage at the transformer/power supply output.
Verify that there are no additional, external switches or
devices which may be interrupting your circuit.
Check for damaged wiring or bad wire splices.
SYMPTOM: Door will not open but strike is working
• Check for other locks on door
• Check for proper lock-latch engagement
• Check for excessive back pressure on door release
latch by following these steps:
Push the door from the outside to try and relieve
the bolt to latch pressure and actuate the strike.
While unlatched swing the door open. If the door
opens, then the bolt may be applying
pressure to the latch. Adjust the position
to relieve the pressure.
Possible remedies include:
• Re-adjust (or install) a door closer
• Remove door silencers
• Correct excessive door warpage
• Re-center electric release in jamb
• Remove or trim weather stripping around the door
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