Curtis 1268 Manual,
Rev. D
49
4,5
WELDED AUX RELAY
Welded aux relay.
1. Aux relay stuck closed.
2. Aux relay shorted.
5,1
KEY SWITCH SRO
SRO fault.
1. Keywswitch not off at power-up.
2. Keyswitch shorted.
5,2
MAIN COIL OPEN
Missing main contactor.
1. Main contactor coil open or not
connected.
5,3
AUX DRIVER ON
Aux (EM brake or WalkAway
™
1. Aux output short to ground.
relay) driver coil held low.
2. Controller defective.
5,4
CIRCUIT BRKR OPEN
Circuit breaker or fuse open
1. Breaker/fuse tripped or open.
in WalkAway
™
circuit.
2. Breaker/fuse defective.
3. Relay/fuse sense line broken.
5,5
MAIN DROPOUT
Main contactor open.
1. Main contactor defective.
TROUBLESHOOTING CHART, cont’d
LED
PROGRAMMER
CODE
LCD DISPLAY
EXPLANATION
POSSIBLE CAUSE
6 — DIAGNOSTICS & TROUBLESHOOTING
LED DIAGNOSTICS
A built-in Status LED is visible through a window in the label on top of the
controller. When the controller detects a fault, the Status LED flashes the
2-digit fault code. The code is flashed continuously until the fault is corrected.
For example, code “3,2”—welded main contactor—appears as:
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
¤
etc.
( 3 , 2 )
( 3 , 2 )
( 3 , 2 )
The codes are listed in the Troubleshooting Chart. Only one fault is indicated
at a time, and faults are not queued up. If multiple faults are active simultane-
ously, the code of the highest priority fault is flashed. After all faults have been
cleared, the code of the last active fault will continue to flash for one minute.
This feature is designed to help service personnel identify intermittent faults
when no programmer is available.
These same fault codes will also be flashed by the external fault LED
(connected to Pin 22), if one is included in the system.