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Tunnel Master® Jr. User Manual
Chapter 8: Troubleshooting
Symptom
Cause
Remedy
Check position of relay toggle
switch.
Move switch to down position.
No power to Relay Box.
Check 120VAC power to relay box.
Pulse / Gate not operating correctly. See “Wash Controller Input Check”
No relays firing.
Ribbon cable is loose.
Re-attach Ribbon cable.
Panic condition present.
Disable panic.
Pulse / Gate not operating.
See “Wash Controller Input Check”.
My display is too dark.
Contrast is not set correctly.
Adjust contrast dial as needed.
None of my selective outputs are
firing.
Unloaded car.
If a roller is fired with no services
selected, the controller will only fire
Mandatory outputs. This is known
as an unloaded car.
Table 8-1.
Tunnel Master Jr. Relay Box Troubleshooting
Symptom
Cause
Remedy
Keypad not responding.
Keypad address not correct.
In most circumstances, the keypad
address in the wash settings should
be 5.
Loss of power to Entrance Keypad.
Check Power LED, if voltage present
LED will flash.
No power to Tunnel Master® Jr.
Reconnect 120VAC to relay box.
Wires and/or plugs loose.
Re-connect as necessary.
Jumpers set up incorrectly.
Check the proper jumper settings.
LEDs are coming on randomly.
Jumpers are set up incorrectly
Check the proper jumper settings.
Keypad failure
Put keypad in diagnostic mode and
press each button to ensure proper
functionality. See Entrance Keypad
diagnostics.
Keypad diagnostic fails.
Keypad failure.
Contact your distributor for a
replacement.
Table 8-2.
Entrance Keypad Troubleshooting
Summary of Contents for Tunnel Master Jr
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