16
B
Troubleshooting
Industrial Duty Logic Operators
Testing C And D Relays
Check Coil Wires. Both are 0VDC at idle. Metering across either coil should read 12VDC when given a command.
Check NO Contact. Metering L1 to either white wire on C or D relay should read line voltage when given a command.
Testing B Relay
Check Coil Wires. 0VDC at idle, 24VDC when given an OPEN command. *Special applications might show voltage in
the opposite direction.
Check NO Contact. Metering L2 to 6 on B relay should read line voltage when given an OPEN command. *Special
applications might show voltage in the opposite direction.
Testing A Relay
Check Coil Wires. 0VDC at idle, 24VDC when given a CLOSE command. *Special applications might show voltage in
the opposite direction.
Check NO Contact. Metering L2 to 2 on A relay should read line voltage when given a CLOSE command. *Special
applications might show voltage in the opposite direction.
Advanced Troubleshooting: Testing Three Phase Logic 3.0 And 4.0 Relays
The following tests should be performed by a qualifi ed technician. A multimeter will be required.
SLOT 1
RADIO
SLS
MRT
1
E2
D1
C2
B2
CLS
OLS
MID
REV
STD
SLOT 2
MOTOR
DIRECTION
MOV
MOV
(GY)
(YE)
(RD)
(WH)
(PU)
(YE)
(OR)
(GY)
(OR)
(PU)
(WH)
(WH)
(WH)
(WH)
(WH)
(WH)
(GY)
(YE)
(WH)
(GY)
(WH)
(WH)
(WH)
(WH)
(WH)
(PU)
(BR)
(BR)
(YE)
208/230/460
VOLT 3PH.
POWER IN
(BK)
COM 120
VAC
240 / 460 /
575 VAC
+24 VAC
-24 VAC
COIL
COIL
COM
COM
NO
NO
See Motor
Connections
See Motor
Connections
8
01
4
62
62
84
01
A
B
C
D
L3 L2 L1
To Next Page
Loading...
