Trane Technologies IntelliPak Signature SCWF - Page 99

SCXF-SVX01T-EN
99
Category Diagnostic
Reason for
Diagnostic
The RTM has lost communication with the SCM.
Controls
Reaction
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
and de-energized.
Reset
Required
(PAR) An automatic reset occurs after communication has been restored.
Space Static Press Setpoint Failure
Problem
The active space static pressure setpoint is out of range.
Check
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
on GBAS, this message will occur.
Reason for
Diagnostic
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).
Controls
Reaction
The default space pressure setpoint will become the active space pressure setpoint.
Reset
Required
(PAR) An automatic reset occurs after the designated space pressure setpoint source sends a signal within range for 10 continuous seconds,
or after a different space pressure setpoint source is user-defined.
Supply Air Pressure Sensor Failure
Problem
The supply air pressure sensor voltage input is out of range.
Check
Check field/unit wiring between the sensor and RTM.
Reason for
Diagnostic
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)
Controls
Reaction
The following functions are disabled;
• SA pressure control
• SA static pressure limit
Reset
Required
(PAR) An automatic reset occurs after the SA temp heating setpoint input returns to within range for 10 continuous seconds, or after a different
SA temp heating setpoint selection source is user-defined.
Supply Air Pressure Setpoint Failure
Problem
The SA pressure input signal is out of range.
Reason for
Diagnostic
The SA pressure setpoint input is sending a signal that is out of range (Input < 1.0 iwc or input > 4.3 iwc)
Controls
Reaction
The default SA pressure setpoint will become the active SA pressure setpoint.
Reset
Required
(PAR) An automatic reset occurs after the designated SA pressure setpoint source sends a signal within range for 10 continuous seconds, or
after a different SA pressure setpoint source is user-defined.
Supply Air Temperature Cool Setpoint Fail
Problem
The active supply air temperature cooling setpoint is out of range.
Reason for
Diagnostic
The input designated as the SA temp cooling setpoint is out is out of range (temp < 35°F or temp > 95°F).
Controls
Reaction
The default HI-set SA temp cooling setpoint becomes the active SA temp cooling setpoint.
Reset
Required
(PAR) An automatic reset occurs after the SA temp cooling setpoint input returns to within range for 10 continuous seconds, or after a different
SA temp cooling setpoint selection source is user-defined.
Supply Air Temperature Heat Setpoint Fail
Problem
The active supply air temperature cooling setpoint is out of range.
Reason for
Diagnostic
The input designated as the SA temp heating setpoint is out is out of range (temp < 35°F or temp > 185°F).
Diagnostics