CVHE-SB-32A 51
Table 5
UCP2 Stepper Module Test Point Voltage Limits
If any of the voltages are out of range, there is a malfunction on the Stepper Board.
The majority of these malfunctions may be diagnosed by using . The ones marked with an
asterisk have been seen in the field before:
Connector VAC VDC
J2 -(1 to 2) or (3 to 4)
J2 -(1 to case) or (2 to
case)
TP2: 5V to ground
20.4 to 33.12 VAC 0 VDC
10 to 17 VAC 13.12 to 21.81
VDC
0 VAC 4.8 to 5.2 VDC
TP4: 24V to ground 0 VAC 23.2 to 25.1 VDC
TP3: 14V to ground 0 VAC 11.45 to 15.75
VDC
TP1: 35V to ground 100m VAC to 72m VAC 26 to 48 VDC
Table 6
UCP2 Stepper Module Troubleshooting
Condition(s) Possible Problem Possible Cause(s) (Solution(s)
Voltage at Test Points
TP1-TP4 on Stepper
module
Wiring between
Stepper module and
actuator motor is
shorted to ground.
1. Wire insulation
bared inside conduit.
1. Seal wire or run new
wire through conduit.
Motor winding
Resistance check Pin
to conduit Motor does
not move.
2. Wire insulation
bared or pinched
inside motor junction
box.
2. Seal wire, or restrip
and rewire motor
junction box. See Table
4 for wiring diagram.
Voltage at Test Points
TP1-TP4 on Stepper
module
Motor winding
resistance check pin
to pin fails.
Motor does not move.
Wiring shorted
together inside
conduit between
Stepper module and
actuator motor.
Insulation bared. Seal wire or run new
wire through conduit.
See Table 4 for wiring
diagram.
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