LiftMaster RSL12U RSL12U Troubleshooting Guide Manual - Page 20

MODELS CSW200U AND SL3000U POWER CONTROL BOARD BIPART DELAY 4 2 6 OPEN LEFT OPEN 8 RIGHT HANDING MODEL CSW200U MODEL SL3000U POWER BOARD (located behind control board) AC POWER SWITCH CONTROL BOARD JUNCTION BOX JUNCTION BOX AC POWER SWITCH COMM LINK BA CLASS 2 SUPPLY 24 VAC 500 mA MAX GND ANTENNA CURRENT MOTOR DRIVE SENSOR ID RESET RPM & LIMITS ALARM EXP. BOARD 24 VAC IN 4 Check the transfomer and control board.* Orange Check the orange 24 VAC IN wires at the control board. The voltage should be about 21-28 Vac. Orange If the voltage is NOT 21-28 Vac, replace the transformer. If the voltage is 21-28 Vac, replace the control board. POWER BOARD SINGLE PHASE J13 J19 J21 J11 J17 J20 MOTOR ID MOTOR RED J14 MOTOR BLUE J10 MOTOR CONTROL CURRENT SENSOR J8 J7 SWITCH TRANSFORMER J5 COMM J3 120VAC J2 MOTOR WHITE J18 INPUT J1 NEUTRAL OUTLET J12 WHITE J6 BLACK J4 INPUT HOT SWITCH 24 V c.a. COM 120 240 Yellow Gray TRANSFORMER 3 Check the power board.* Check the gray and yellow transformer wires on the power board. The voltage should be 120 Vac. If not, replace the power board. 2 Check the AC power switch. Is it ON? Green Black White AC POWER SWITCH * GROUND HOT NEUTRAL J16 JUNCTION BOX 1 Check the incoming power.* Check breaker first, then check wiring coming into operator. The voltage should be 120 Vac. INCOMING POWER 19