Troubleshooting Reference
2-31
element
TM
Series
Troubleshooting Reference
Always observe safety precautions when troubleshooting. Lethal voltages are present.
This section includes:
• Bus voltage testpoints and fuse locations
• Touch screen tools, page 2-32
• Circuit board descriptions, page 2-32
• Fault Message Descriptions, page 2-52
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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