Troubleshooting Reference
2-31
element
TM
Series
Troubleshooting Reference
Danger
Always observe safety precautions when troubleshooting. Lethal voltages are present.
This section includes:
• Bus voltage testpoints and fuse locations
• Touch screen tools,
• Fault Message Descriptions,
Bus Voltage Testpoints and Fuse Locations
Required operating voltages are distributed through fused buses.
Table 2.5 Bus Voltages
Bus
Description
Testpoints
1
Ground
Controller ground is critical. Poor ground introduces potential danger,
electrical noise, and can prevent system inputs, outputs, and assem-
blies from working correctly. System must be grounded to a point cer-
tified by an Electrician. NEC 250.
2
110 VAC
110VAC, 2 Bus for high voltage connections throughout system
24
24 VDC
24VDC, +24, 24CTP, 24HWY buses.
Table 2.6 SC-UPD Board Fuses
Fuse
Use
F2
2 Bus, 2A, 250V. Bussman AGC, Littelfuse 312
F2MV
2MV Bus, 3A, 250V. Bussman MDQ, Littelfuse 313
F24CTP
24CT Bus, 2A, 250V, Bussman AGC, Littelfuse 312
F24FS
F24FS Bus, 2A, 250V. Bussman MDQ, Littelfuse 313
F24HWY
24H Bus, 1A, 250V, Bussman AGC, Littelfuse 312. 24V supply to fire alarm initiating devices,
switches, and indicators.
F24VDC
24VDC Bus, 6A, 250V, Bussman AGC, Littelfuse 312.
FDLN1
F7, 4A, 250V, Bussman MDQ Littelfuse 313. AC to door operator.
FDLN2
F8, 4A, 250V, Bussman MDQ Littelfuse 313. AC to door operator.
FFLO
Car fan and light output. 6A, 250V, Bussman AGC, Littelfuse 312
FGOV
GOS1, 4A, 250V, Bussman AGC, Littelfuse 312. 110VAC to governor overspeed switch.
FXL1
10A, 250V, Bussman AGC, Littelfuse 312. Supply for CPU, CTPR, LOPM, 24CT, and 24H buses.
FXL2
10A, 250V, Bussman AGC, Littelfuse 312. Supply for CPU, CTPR, LOPM, 24CT, and 24H buses.
Table 2.7 Backplane Fuses
Bus
Description
Type
FL1 - FL3
Line Voltage
See fuse labeling in controller.
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