Trane IntelliPak SCRF 25, Инструкция по установке, эксплуатации и обслуживанию

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110 SCXF-SVX01Q-EN
Category Diagnostic
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).
Controls
Reaction
The default HI-set SA temp heating setpoint becomes the active SA temp heating setpoint.
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 Temperature Failure
Problem
The supply air temperature sensor input is out of range.
Check
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.
Reason for
Diagnostic The unit is reading a signal that is out of range for the supply air temperature input on the RTM (temp. < -55°F or temp > 209°
F).
Controls
Reaction
These unit functions are disabled:
• Supply air tempering
• Economizing
• Supply air temperature low limit function (CV units)
• Supply air temperature control heating and cooling functions (VAV units)
Reset
Required
(PAR) an automatic reset occurs after the designated S/A temperature input returns to its allowable range. To prevent rapid
cycling of the diagnostic, there is a 10 second delay before the automatic reset.
Supply Fan Failure
Problem
There is no supply airflow indication after the supply fan is requested on.
Check
Check belts, linkages, etc. on the supply fan assembly. If these are ok, check field/unit wiring between RTM and supply fan. If
the supply fan runs in service mode, then verify airflow proving switch and wiring.
Reason for
Diagnostic
• The supply airflow input is detected OPEN for 40 continuous seconds during any period of time in which the supply fan
binary output is ON. between 830 ohms (200°F) and 345.7 ohms (-40°F). If so, check field/unit wiring between the sensor
and MCM.
• This input is ignored for up to 5 minutes after the supply fan starts, until airflow is first detected.
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