Trane Technologies IntelliPak Signature SCWF Installation, Operation And Maintenance Manual page 98

Diagnostics
Category Diagnostic
Reason for
The unit is reading a signal that is out of range for the return air humidity sensor (humidity < 5% or humidity > 100%).
Diagnostic
The economizer enable r.e. enthalpy function reverts to reference enthalpy changeover ("Level 2") control.
Reaction
Reset
(PMR) An automatic reset occurs after the RA humidity input returns to its allowable range continuously for 10 seconds.
Required
Return Air Temperature Sensor Failure
On units with the comparative enthalpy option, the return air 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 the sensor and ECEM.
Check
Reason for
The unit is reading a signal that is out of range for the return air humidity sensor (temp < -55°F or temp > 209°F).
Diagnostic
The economizer enable r.e. enthalpy function reverts to reference enthalpy changeover ("Level 2") control.
Reaction
Reset
(PAR) An automatic reset occurs after the RA temp input returns to its allowable range continuously for 10 seconds.
Required
RTM Auxiliary Temperature Sensor Failure
The RTM auxiliary temperature sensor data 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 and RTM.
Check
Reason for At least one enabled unit function has the RTM auxiliary temperature input designated as its sensor, and the unit is reading a signal that is out
Diagnostic of range for this input (temp. < -55°F or temp > 209°F).
Controls
The functions with the RTM auxiliary 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 cycling of the
Required diagnostic, there is a 10 second delay before the automatic reset.
RTM Data Storage Error
Problem There was a data transmission error.
This can be caused by an intermittent power loss. Turn the unit off for 1-2 minutes, then back on again. If diagnostic persists, then the RTM
Check
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 and RTM.
Check
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 that is out of
Diagnostic 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 cycling of the
Required 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
98 SCXF-SVX01T-EN