Trane IntelliPak SCWF 20 Installation, Operation And Maintenance Manual page 109

Category Diagnostic
This can be caused by an intermittent power loss. Turn the unit off for 1-2 minutes, then back on again. If diagnostic persists,
Check
then the RTM may need to be replaced.
Reason for
An error occurred while the RTM was writing data to its internal non-volitile memory (EEPROM).
Diagnostic
Controls
An information only diagnostic will be displayed at the human interface.
Reaction
Reset
(INFO) A manual reset may be made at the human interface, at Tracer Summit, or by cycling power to the RTM.
Required
RTM Zone Sensor Failure
The RTM zone temperature sensor input is out of range.
Problem
Sensor resistance should be between 830 ohms (200°F) and 345.7 ohms (-40°F). If so, check field/unit wiring between sensor
Check
and RTM.
Reason for At least one enabled unit function has the RTM zone temperature input designated as its sensor, and the unit is reading a signal
Diagnostic that is out of range for this input (temp. < -55°F or temp > 150°F).
Controls
The functions with the RTM zone temperature input designated as their sensor are disabled.
Reaction
Reset
(PAR) an automatic reset occurs after the designated zone temperature signal returns to its allowable range. To prevent rapid
Required cycling of the diagnostic, there is a 10 second delay before the automatic reset.
S
SCM Communication Failure
Problem The RTM has lost communication with the SCM.
Check field/unit wiring between the RTM and SCM.
Check
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
Controls
to be zeroed 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
Check
analog inputs 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
Required continuous seconds, 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
SCXF-SVX01Q-EN
D D i i a a g g n n o o s s t t i i c c s s
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