Electrical Problems - Cardiac Science ST 55 Service Manual

Troubleshooting

Electrical Problems

Table 6-1: Treadmill Does Not Start
Possible Cause
Treadmill not plugged in.
Circuit breaker on treadmill set to
Off.
Building circuit breaker tripped.
Power to the stress monitor not
on.
Power cord damaged.
Fuse in treadmill blown.
Control cable between variable
speed drive (drive board on the AC
Drive Module) and stress monitor
is faulty.
Drive board on the AC Drive
Module failure.
Configuration plate connection
faulty.
Optional emergency stop button
activated.
70-00298-01 A
6-4
Action
Plug power cord into appropriate outlet.
Set treadmill circuit breaker to On.
Contact building maintenance to reset circuit breaker. If circuit breaker
trips again:
1. Check outlet voltage. If necessary, verify that the power at the outlet
and at the breaker is the correct rating for the treadmill.
2. Verify that the power cord is not damaged.
Replace the configuration plate (faulty in-rush limiter).
3.
Turn on power to stress monitor.
Remove cord from outlet and replace.
If any of the transformer primary fuses, F1 or F2, are blown:
Check the primary transformer windings for continuity. Should be
1.
2 ohms or less.
Replace fuses and if the fuses blow again, isolate mechanical
2.
assembly and ensure that no parts are jammed (for example, rack
gear in grade change assembly). If F1 or F2 are blown, check the 12
volt power supply.
Check for bent or broken pins. Replace control cable.
Check power supply at test points. Replace AC Drive Module, if
necessary.
Replace configuration plate.
Push in button and twist counter-clockwise to unlock.
TM 55/65 Treadmill 4.0