Mec 2033ES - LED Diagnostics Definitions (Flash Codes)

"2033ES / 2633ES" Service & Parts Manual - ANSI Specifications October 2008
Page 4-15
LED Steady On
LED Off
2 Flashes
3 Flashes
4 Flashes
5 Flashes
Controller is operational and detects no irregularities on monitored circuits.
No power-up
• No power to pin # 1.
• No ground to B- post.
• LED failure or internal controller fault.
Procedure fault.
• Enable depressed at power up.
• Enable depressed for more then 15 seconds without function request.
• No signal on wire 17 pin # 2 when function requested.
• No B- to diode board.
• Failed diode/s.
• Damaged wire harness.
• Internal controller fault.
Motor circuit low.
Set with unit at rest and is the result of the voltage at M-2 dropping to
approximately 4 volts or lower. Possible causes:
• Short to ground in the motor circuit between the motor contactor and
the M-2 terminal.
Motor circuit high.
Set with the unit at rest and is the result of the voltage at M-2 terminal rising
above 21 volts. Possible causes:
• Motor contactor points are welded shut
Motor contactor circuit open.
Set when a function is requested but no current can flow through the motor
circuit to the M-2 terminal. Possible causes:
• Blown 200 amp fuse
• Malfunctioning motor contactor
• Worn motor brushes
• Incomplete circuit to the Sevcon pin #6
If the motor and contactor circuits are diagnosed as working properly:
• Sevcon internal fault
LED Diagnostics Definitions (Flash Codes)
continued…
LED READING DIAGNOSIS