06-2023 dormakaba Canada Inc. RAC5 MFC Installation Guide – PK3738 | 16
5.3 External Inputs Troubleshooting
Tamper Alarm is not activating
the premise alarm
• Verify that the Tamper Alarm LED (D53) on the RAC5 MFC controller
turns on when the button is pressed. If not, verify the wiring on the
Tamper Switch
5.4 Relay Expansion Board Troubleshooting
The power for the RAC5 MFC must be turned off before connecting or disconnecting the
Relay Expansion Board or if changing the relay output state using Switch 4.
If Switch 4 is set to RELAYS OFF, LEDs on the Relay Expansion board should be normally OFF in idle state.
If Switch 4 is set to RELAYS ON, LEDs on the Relay Expansion board should be normally ON in idle state.
LEDs on the Relay Expansion
Board are ON in idle state when
Switch 4 is set to RELAYS OFF
• Verify that the ribbon cable between the RAC5 MFC controller and the
Relay Expansion Board is connected properly. If it is not connected,
turn the power off, connect the cable, and turn the power back on
• Verify that the relays are not bypassed (the bypass switches SW1 and
SW3 on the Relay Expansion Board should be off)
• Verify that the RAC5 MFC is not in Passage Mode
Relay Expansion Board relays
do not change states
• Activate the manual bypass switches SW1 and SW3 on the Relay
Expansion Board and verify that the relays are activated and the
corresponding LEDs turn ON or OFF depending on the setting of the
SW4 switch. De-activate the manual bypass
• Verify that the RAC5 MFC controller is active: Heartbeat LED D46
should be blinking, and the Reader LEDs (D48 and D37) are
respectively ON. If not, reset the RAC5 MFC Controller by pressing the
reset switch (SW1) or disconnect and reconnect the power.
• Verify that the RAC5 MFC controller is programmed properly
• Verify that the card is encoded properly
Access Override not functioning
• Verify that the Access Override input is connected to a Normally
Closed contact
• Verify that the Access Override LED (D47) is normally on and turns off
when the Access Override is present
• NOTE: Access Override, when enabled, will remove power from the
relays and they will fail safe or secure depending on the configuration
of the SW4 switch
RAC5 MFC Controller PCB
resets when relay is activated
or deactivated
• Verify that there is no short-circuit on the locking device wiring
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