ProTechTPS Total Protection System Manual 26710V1
96 Woodward
I/O Troubleshooting
Problem or diagnostic
indication
Possible Cause Suggested Actions
Power Supply Inputs not
working properly. Power
supply input alarm present.
Wiring fault, terminal block
loose.
Power source breaker or fuse
open.
Only one power supply is
connected.
Power supply input out of
range or insufficient rating.
Verify the wiring and terminal block
connections.
Verify breaker or fuse.
On the front panel, press the VIEW button
under the ALARM LED and check for
Power Supply 1 or 2 Fault.
Check input voltage level and verify it is
within acceptable range per electrical
specifications. Also check that the power
supply has appropriate rating to power the
ProTechTPS.
Speed Input not working Wiring fault, terminal block
loose.
Configuration.
Alarms and Faults.
Signal level.
Active Probe Power.
Verify the wiring and terminal block
connections.
On the front panel, check the Speed Input
Configure Menu and verify all proper
configuration options are selected.
Verify there are no alarms or faults that
may indicate a setup problem (open wire
trip, speed lost, speed fail, etc.)
Verify the input signal levels are within the
electrical specifications. Also verify shield
connections.
If using an active probe, verify probe
power is correct by disconnecting the
probe and measuring from terminals 69 to
71. The voltage should be 24 V ±10%.
Attach probe and measure again to verify
the probe is not overloading the voltage
provided by the ProTechTPS.
Dedicated discrete input
not working (Start, Reset or
Speed Fail Override)
Wiring fault, terminal block
loose.
Configuration.
Signal source not working
correctly or not within
acceptable electrical
specifications.
Internally supplied wetting
voltage fault.
Verify the wiring and terminal block
connections.
On the front panel, check the Dedicated
Discrete Inputs Monitor Menu and verify
the logic state is correct.
Check signal level and verify it is within
acceptable range per electrical
specifications.
Measure voltage from terminal 1 to
terminal 81 and verify it is 23 V ±2 V. If out
of range, return unit to Woodward.
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