Trane Technologies IntelliPak Signature SCWF Installation, Operation And Maintenance Manual page 99

Category Diagnostic
Reason for
The RTM has lost communication with the SCM.
Diagnostic
A "lockout" request is sent to the compressor staging control function. A fail-safe function in the SCM will cause all SCM outputs to be zeroed
Controls
and de-energized.
Reaction
Reset
(PAR) An automatic reset occurs after communication has been restored.
Required
Space Static Press Setpoint Failure
The active space static pressure setpoint is out of range.
Problem
Check setpoint value. Also, if space pressure setpoint source is GBAS, but this setpoint has not been assigned to any of the four analog inputs
Check
on GBAS, this message will occur.
Reason for
The unit is reading a signal that is out of range for the space static pressure setpoint (input < 0.03 iwc or input > 0.20 iwc).
Diagnostic
Controls
The default space pressure setpoint will become the active space pressure setpoint.
Reaction
Reset (PAR) An automatic reset occurs after the designated space pressure setpoint source sends a signal within range for 10 continuous seconds,
Required or after a different space pressure setpoint source is user-defined.
Supply Air Pressure Sensor Failure
The supply air pressure sensor voltage input is out of range.
Problem
Check field/unit wiring between the sensor and RTM.
Check
Reason for
The unit is reading a signal that is out of range for the supply air pressure sensor voltage input (input < 40mV or input > 4.75V)
Diagnostic
The following functions are disabled;
Controls
• SA pressure control
Reaction
• SA static pressure limit
Reset (PAR) An automatic reset occurs after the SA temp heating setpoint input returns to within range for 10 continuous seconds, or after a different
Required SA temp heating setpoint selection source is user-defined.
Supply Air Pressure Setpoint Failure
The SA pressure input signal is out of range.
Problem
Reason for
The SA pressure setpoint input is sending a signal that is out of range (Input < 1.0 iwc or input > 4.3 iwc)
Diagnostic
Controls
The default SA pressure setpoint will become the active SA pressure setpoint.
Reaction
Reset (PAR) An automatic reset occurs after the designated SA pressure setpoint source sends a signal within range for 10 continuous seconds, or
Required after a different SA pressure setpoint source is user-defined.
Supply Air Temperature Cool Setpoint Fail
The active supply air temperature cooling setpoint is out of range.
Problem
Reason for
The input designated as the SA temp cooling setpoint is out is out of range (temp < 35°F or temp > 95°F).
Diagnostic
Controls
The default HI-set SA temp cooling setpoint becomes the active SA temp cooling setpoint.
Reaction
Reset (PAR) An automatic reset occurs after the SA temp cooling setpoint input returns to within range for 10 continuous seconds, or after a different
Required SA temp cooling setpoint selection source is user-defined.
Supply Air Temperature Heat Setpoint Fail
The active supply air temperature cooling setpoint is out of range.
Problem
Reason for
The input designated as the SA temp heating setpoint is out is out of range (temp < 35°F or temp > 185°F).
Diagnostic
SCXF-SVX01T-EN
Diagnostics
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