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Trouble Shooting Tips
Listed below are some problems that might be encountered during
installation or at any other time and possible solutions for correcting
them.
Caution: This unit contains areas of exposed high voltage. All
troubleshooting and maintenance should be performed by a
qualified electrician.
Problem
No output voltage measured across terminals 24V, FSF, or FSC.
Solution
›
Check for 120VAC across terminals of input to power supply
module.
›
If 120VAC is present, disconnect field wires from all used outputs
(24V, FSF, FSC) and measure for 24VDC across the "24V" terminals.
›
If 24VDC is now present, check for shorts across field wires for
each output. If the load is an electrified locking device mounted in the
door, check the electric hinge for pinched wires behind each leaf. Also
check for shorted wires between the locking device and raceway in the
door.
›
If 24VDC is not present across terminals marked "24V" (with field
wires still disconnected from all outputs), disconnect the red and black
wire leads connected to the +,- terminals of the output to the power
supply module and check for 24VDC at this output. If voltage is now
present across the power supply module's output, it can be assumed
that there is a short circuit somewhere on the control board and it will
need to be replaced. If voltage is still not present across the output to
the power supply module, then it can be assumed the power supply
module itself is damaged and must be replaced.
Problem
The electrified locking device behaves the opposite of what was
expected, i.e., it locks when intended to unlock, or unlocks when
intended to lock.
Solution
›
A fail safe type locking device may be incorrectly wired to the fail
secure output terminals (FSC). It must be wired to the terminals marked
"FSF".
›
A fail secure type locking device may be incorrectly wired to the fail
safe output terminals (FSF). It must be wired to the terminals marked
"FSC".
›
Make sure that the electric locking device has been correctly
modified for the function intended: Fail Safe (power to lock), Fail Secure
(power to unlock).
Problem
A maintained activation switch is intended to be used to initiate the
automated door opening system and hold the door in an open position;
but when activated, the door goes through a complete open/close cycle
instead of staying open.
Input Voltage:
120VAC/240VAC, 50/60Hz
AC Current:
900mA/120VAC, 600mA/240VAC
Output Voltage: 24VDC Filtered, Regulated
Output Current: 2.0A
Output Power:
48W
Protection:
Overload, Over Voltage, Short Circuit
REV 2
INSTALLATION INSTRUCTIONS (cont)
Solution
›
Dip switch #1 from the onboard dip switch bank is set for
"One-Shot Activation". Correct this by placing dip switch #1 to the "ON"
position. (See the above section entitled, "One-Shot Activation Option"
under "Activation Switches" for more details.)
Problem
When the 2904 is powered up and the green "Power" indicator on the
small p.c. board is lit, the electric locking device immediately releases,
followed by activation of the automatic door operator, without manually
activating the system.
Solution
›
Field wires from the activation switch may be shorted together.
›
The 2904 activation inputs have been mistakenly wired to the
normally closed contacts of the activation switch instead of the normally
open contacts.
Problem
When the 2904 is powered up and the green "Power" indicator on the
small p.c. board is lit, the electric locking device does not release, but
the automatic door operator is activated and attempting to open the
door, without manually activating the system.
Solution
›
The dip switch settings for the ADO output are not correct, or are
reversed from what they should be. Determine if the automatic door
operator activation input accepts a contact closure or open contact
signal for opening the door; then set the dip switches accordingly as per
instructed in the section above entitled, "Automatic Door Operator".
Problem
The electric locking device all of a sudden releases, and the automatic
door operator opens the door without being manually activated
(characteristic of a symptom involving a fail safe locking device).
Solution
›
The power supply has shut down due to a shorted output.
›
Loss of AC power to the 2904.
Problem
The automatic door operator all of a sudden becomes activated and is
attempting to open the door; but the electric locking device remains
locked, preventing the door from opening (characteristic of a symptom
involving a fail secure locking device).
Solution
›
The power supply has shut down due to a shorted output.
›
Loss of AC power to the 2904.
SPECIFICATIONS
27390037
2904 Power Supply
Installation Instructions
I-EA00041
Page 4 of 6
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