Chamberlain K001A5729, Manual

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15
B
Troubleshooting
Industrial Duty Logic Operators
Testing C Relay
Check Coil Wires. 0VDC at idle, 24VDC when given a command either direction. Check NO Contact. Metering L1 to
either white wire on C 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.
Testing K3 Relay (Start Winding Relay On Board With White And Yellow Wires)
K3 is a NO relay that closes for 1.25 seconds during start up. To test, remove White and Yellow wires and test for
continuity across the contacts on the relay. Reading should be OPEN when operator is idle and should close for 1.25
seconds when operator is given a command.
NOTE: 1) This test will put the operator into a restricted close mode. Simply cycle power to reset.
2) If the K3 relay is stuck CLOSED, the motor will 'GROWL' loudly and trip the circuit breaker.
3) If the K3 relay is stuck OPEN, motor will only hum.
Advanced Troubleshooting: Testing Single Phase Logic 3.0 And 4.0 Relays
The following tests should be performed by a qualifi ed technician. A multimeter is required.
SLOT 1
RADIO
SLS CLS OLS MID
REV
STD
SLOT 2
MOTOR
DIRECTION
MOV
MOV
(YE)
(OR)
(GY)
(OR) (PU)
(WH)
(WH)
(WH)
(WH)
(WH)
(PU)
(YE)
(WH)
(WH)
(WH)
(WH)
(YE)
hot
neutral
ground
(BK)
COM 120
VAC
120 / 240
VAC
+24 VAC -24 VAC
See Motor
Connections
8
0 1
4
6 2
6 2
8 4
0 1
COIL
COM
NO
C
B A
(WH)
(BL) (GY)
(YE)
(BR)
(GY)
See Motor
Connections
L3 L2 L1