4.5 - GREEN MACHINE
™
- North America - Installation, Operation, Maintenance, & Troubleshooting Manual
Chapter 8: Troubleshooting
Page 127
Option 2: Control Panel is powered from ESO Breaker
, continued…
4. Check to see if the Safety Disconnect Switch at the GREEN MACHINE is turned ON. If
not, turn ON the switch. If the switch has a Lockout/Tagout lock, do not remove the
lock and leave the switch OFF. Someone is preforming maintenance.
5. Check that there is power at the VST Control Panel and the wiring is installed correctly
and tight.
See Figure 8-10.
•
Verify that the VST Control Panel fuses and wiring to power supply are correct.
a)
With power OFF to the VST Control Panel, check to see if the 24 VDC
power supply FU 4 fuse is functioning by checking continuity. The 5-amp
fuse may be blown. If so replace the fuse.
b) With the power ON to the VST Control Panel, verify there is 24 VDC
power out of the 24 VDC power supply. On the 24 VDC power supply,
check the OUTPUT terminals marked
–
V and +V. The voltage should be
24 ± 5 VDC. The 24 VDC power supply may be damaged. If so replace the
24 VDC power supply.
c)
With the power ON to the VST Control Panel, check the 24 VDC wire
connections to the GREEN MACHINE Controller. At the PLC Controller,
check to make sure there is 24 VDC power across wire number 02092 and
the ground. The PLC Controller may be damaged. If so replace the PLC
Controller.
•
If the VST Control Panel worked prior to this issue after checking STEPS 1-5,
and the Control Panel still does not have power, call a VST Service Technician.
•
Troubleshoot the VST Control Panel by checking the power circuit to make sure none
of the electrical components are damaged.
•
The parts can be found under the Control Panel Replacement Parts List. These
parts can be purchased from VST or a distributor, but they must be identical to
the parts listed.
•
See the Control Panel Parts Replacement Table in Chapter 9.
•
115 VAC 20A Motor Circuit Controller
•
115 VAC Side Mount Aux. Contact N.O.
•
Solid State Relay, 30A, SPST, 90-280V INPUT, N.O., 24-280 VAC LOAD
•
115 VAC Over/Under Voltage Relay
