Skyjack SJ61T - Red Error LED Is on; Load Cell Red Alarm LED Is off (with Platform Overloaded); Platform Indicator Light Does Not Turn on; Audible Alarm Does Not Turn on

Telescopic Boom Series
Models SJ61T & SJ66T
194312
December 2007 Page 147
Section 4 - Troubleshooting Information Service and Maintenance
4.3-3 Red Error LED is ON
2. Open safety contact circuit.
- Check for connections with wires #161 and #162A at platform terminal block and base terminal
block. Check resistor R6 for 680 ohms.
4.3-4 Load Cell red Alarm LED is OFF (with platform overloaded)
1. Open safety contact circuit.
- Check for connections with wires #161 and #162A at platform terminal block and base terminal
block. Check resistor R6 for 680 ohms.
4.3-5 Platform Indicator Light does not turn ON
1. Defective lamp.
- Check lamp. Replace if defective.
2. Defective relay 82CR.
- Check relay. Replace if defective.
3. Load cell circuit not operating.
- Check for connections with wire #02A at pilot light strip and relay 82CR, and wire #82 at
platform terminal block and relay 82CR.
4. Defective load cell.
- Defective if 0V is measured between wire #82 and #02 from platform terminal block.
4.3-6 Audible Alarm does not turn ON
1. Defective alarm BP3.
- Check alarm. Replace if defective.
2. Open or defective diode D118.
- Check diode. Replace if defective.
3. Load cell circuit not operating.
- Check for connections with wires #02A and #118 at platform terminal block.
4. Defective load cell.
- Defective if 0V is measured between wire #118 and #02 from platform terminal block.
4.3-7 Boom and Drive Functions are Enabled (with boom extended)
1. “Fly IN" limit switch LS3 is not operating properly.
- Check for voltage (0V) between wires #59 and #02 from platform terminal block. If 12V is
measured, check for proper actuation of limit switch. Readjust limit switch if necessary.
2. Defective load cell. Safety contact remains closed.
- Check for voltage (0V) between wires #162A and #02 from base terminal block. Defective if
12V is measured.