Trane Technologies IntelliPak Signature SCWF - Page 103

SCXF-SVX01T-EN
103
Category Diagnostic
Reset
Required
An automatic reset occurs after one complete set of IPC packets is received.
WSM Mixed Air Temp Sensor Fail
Activation
Conditions
Temperature <-50°F or temperature >209°F, and sensor is selected for use by “waterside economizer temperature enable function” or “preheat
function”
Time to React 10 sec < T < 20 sec
Actions to be
Initiated
“Waterside economizer temperature enable function” uses supply air cooling setpoint instead of mixed air temperature. If mixed air temperature
is used for “preheat function”, issue a “disable” request to “preheat function”.
Reset
An automatic reset occurs after mixed air temp. input returns to within range continuously for 10 seconds.
Water Flow Fail
Data used
(module,
packet, byte,
bit)
WSM, 01,19, 05
Activation
Conditions
Water flow input is detected open:
• At the end of pre-cool water flow initiation state, or
• Continuously for five minutes while:
– Water side economizer is open 100%,
– Presetting of a head pressure valve, or
– Demand for mechanical cooling.
Unit must be
Configured with water cooled condenser and/or water economizer and have water flow switch installed.
Time to React Immediate
Actions to be
Initiated
A “lockout all ckts” request is issued to the “compressor staging function”
Reset
Automatic reset occurs after water flow input returns to within range continuously for 3 seconds, water pump is requested OFF, or water flow
switch becomes not installed.
Z
Zone Cool Setpoint Failure
Problem
Occupied zone cooling setpoint is out of range.
Reason for
Diagnostic
Input designated as occupied zone cooling setpoint source is out of range (temp. < 45°F or > 94°F).
Controls
Reaction
The active occupied zone cooling setpoint reverts to the default occupied zone cooling setpoint.
Reset
Required
(PAR) an automatic reset occurs after designated occupied zone CSP input returns to its allowable range for 10 continuous seconds, or after a
different valid occupied zone CSP selection source is user-defined.
Diagnostics