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4. Front Panel “BLUE” Light and “RED” Light “ON”
MLG-460 “ON” button does respond ...
a. PROBABLE CAUSES;
1a) EMERGENCY STOP BUTTONS 1, 2, and 3.
b. POSSIBLE SOLUTIONS;
1b) Verify that ALL EMERGENCY STOP buttons are pushed in.
• EMERGENCY STOP 1 - main enclosed door
• EMERGENCY STOP 2 - pendent control
• EMERGENCY STOP 3 - rear control panel (2-door models only)
• If ALL EMERGENCY STOP buttons are “disengaged,” press “ON” located on the main
enclosure door.
• If no, go to section 3 on page 54.
Does the system “GREEN” “ON” light illuminate?
• If not, check the EMERGENCY STOP and drying system “ON/OFF” circuits. (Refer to
ladder diagram.)
5. Front Panel, “BLUE” (main panel) light, “RED” (sprinkler power) light, and “GREEN”
(control power) light “ON”
The system has one or more of the following symptoms;
• OPERATOR INTERFACE TERMINAL - no display or displays “LINE FAULT” message.
• PROGRAMMABLE LOGIC CONTROLLER (PLC) - no indicator lights “ON.”
• CONVENIENCE OUTLET - no power.
• HI-LIMIT CONTROLLERS (HLS1 and HLS2) - no display.
a. PROBABLE CAUSES;
1a) Fuse 7 -- PLC (Programmable Logic Controller) power
Fuse 8 -- 24 volt DC power
Fuse 9 -- convenience outlet
Fuse 10 -hi-limit controller power
2a) Malfunctioning PLC (Programmable Logic Controller).