Precor AMT12 base, Service Manual

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pedaling the unit if you have an external power supply. Otherwise, you will need to continue to
pedal the unit. Connect a DC volt meter to the J3 connector on the lower PCA as follows:
voltmeter common lead to terminal 3 (black wire) and voltmeter "hot" lead to terminal 2 (red wire).
Using the STRIDE HEIGHT
▲ or ▼
keys operate the incline. The voltmeter should read +12
VDC approximately when the incline is instructed to move upward and -12 VDC approximately
when the incline is instructed to move downward. If the either voltage measurement is significantly
low, replace the battery.
Troubleshooting Communications
Errors 30, 31, 32 and 33 - Communications Error
Description
Errors 30 through 33 all indicate the loss of communications or erratic communications between the
microprocessors in the upper PCA and the lower PCA. The trouble shooting procedures for all of the
communication errors are essentially the same.
Error 30 is defined as upper PCA not receiving data from lower PCA.
Error 31 is defined as faulty data received from lower PCA.
Error 32 is defined as lower PCA not receiving data from upper PCA.
Error 33 is defined as faulty data received from upper PCA
Possible Causes
1 An upper PCA to lower PCA interconnect cable (or modular coupler) is bad.
2 The interconnect cable at the upper PCA was mistakenly plugged into the CSAFE connector.
3 +5 VDC power supply is being overloaded by another component that is plugged onto the lower
PCA.
4 A defective lower control module.
5 A defective upper PCA.
Possible Remedies