Trane Technologies IntelliPak Signature SCWF Installation, Operation And Maintenance Manual page 94

Diagnostics
Category Diagnostic
Time to React 10 sec < T < 20 sec
Diagnostic
Text
(Human
"ENT COND WATER TEMP SENSOR FAIL"
Interface
Display)
Actions to be
A "Lockout All Ckts" request is issued to the "Compressor Staging Function"
Initiated
An automatic reset occurs after the entering condenser water temperature input returns to within range continuously for 15 seconds.
Reset
Entering Water Temperature Sensor Fail
Data used
(module,
WSM, 01,18,05
packet, byte,
bit)
Activation
Temperature < -50°F or temperature > 209°F, and unit configured with water cooled condenser and/or economizer
Conditions
Time to React 10 sec < T < 20 sec
Diagnostic
Text
(Human
"ENTERING WATER TEMP SENSOR FAIL"
Interface
Display)
Actions to be
A "Disable Water Side Economizer" request is issued to "Water Side Economizer Temperature Enable Function"
Initiated
An automatic reset occurs after the Entering Water Temp. input returns to within range continuously for 10 seconds.
Reset
Evaporator Temperature Sensor Failure—Circuit 1, 2, 3, or 4
The evaporator temperature sensor (ckt #1, 2, 3, or 4) is out of range.
Problem
Sensor resistance should be between 830 ohms (200°F) and 345.7Kohms (-40°F). If so, check field/unit wiring between sensor and MCM/
Check
SCM.
Reason for
The unit is reading a signal that is out of range for the circuit #1 evaporator temperature sensor input (temp < -55°F or temp > 209°F).
Diagnostic
Controls
The coil frost protection function for the refrigeration circuit (#1, 2, 3, or 4) only is disabled.
Reaction
Reset
(PAR) An automatic reset occurs after the #1, 2, 3, or 4 evaporator temp input returns to its allowable range for 10 seconds.
Required
G
GBAS 0-5 VDC Module Communication Failure
Problem The RTM has lost communication with the GBAS module.
Field/unit wiring between RTM and GBAS.
Check
Reason for
The RTM has lost communication with the GBAS module.
Diagnostic
The UCM will initiate the following actions;
• If the demand limit input was closed prior to the communications loss, then the demand limit commands issued to the heat operation
function (if applicable) and the compressor staging/chilled water cooling function will be cancelled.
• If any of the GBAS setpoint control parameters are the HI-selected setpoint sources, then those setpoints will revert to the default HI
Reaction
setpoints.
• Any active GBAS output control parameters will be ignored.
• A failsafe function in the GBAS module will cause all GBAS outputs to be zeroed and de-energized.
Reset
(PAR) An automatic reset occurs after communication has been restored.
Required
94 SCXF-SVX01T-EN