Trane IntelliPak I Programming, Troubleshooting Manual page 141

DIAGNOSTIC DISPLAYED
Supply Air Reheat Setpoint
Failure
Problem: The input designated
as Supply Air Reheast
SETPOINT source is out of
range.
Check: Wiring to the GBAS
input designated for Supply Air
Reheat SETPOINT or
check BAS/Network interface
card status and wiring.
Supply Air Temperature
Cool SETPOINT Failure
Problem: The active Supply Air
Temperature Cooling
SETPOINT is out of range.
Supply Air Temperature
Heat SETPOINT Failure
Problem: The active Supply Air
Temperature Cooling
SETPOINT is out of range.
Supply Air Temperature
Sensor Failure
Problem: The Supply Air
Temperature sensor input is
out of range.
Check: Sensor resistance
should be between 830 ohms
(200 F) and 345.7Kohms (-40
F). Check field/unit wiring
between Sensor and RTM.
Supply Fan Failure
Problem: There is no supply
airflow indication after the
supply fan has been 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 Supply Fan will run in
service mode, then verify
airflow proving switch and
wiring.
RT-SVP04F-EN
REASON FOR DIAGNOSTIC
Supply Air Reheast SETPOINT
is out of range:
Temperature < 60 F or
Temperature > 90 F
The input designated as the
Supply Air Temperature
Cooling SETPOINT is out is out
of range (Temperature < 35 F
or Temperature > 95 F).
The input designated as the
Supply Air Temperature
Heating SETPOINT is out is out
of range (Temperature < 35 F
or Temperature > 185 F).
The unit is reading a signal
that is out of range for the
Supply Air Temperature input
on the RTM (Temperature < -
55 F or Temperature > 209 F).
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. This input is ignored for
up to 5 minutes after the
supply fan is first started, until
airflow is first detected.
System Testing & Troubleshooting
UCM'S REACTION
The active Supply Air Reheat
SETPOINT
reverts to the default Supply
Air Reheat SETPOINT.
The default HI-set Supply Air
Temperature Cooling
SETPOINT becomes the active
Supply Air Temperature
Cooling SETPOINT.
The default HI-set Supply Air
Temperature Heating
SETPOINT becomes the active
Supply Air Temperature
Heating SETPOINT.
These unit functions are
disabled;
a. Supply Air Tempering
b. Economizing
c. On CV units, the Supply Air
Temperature low limit function
is disabled.
d. On VAV units, the Supply
Air Temperature Control
heating and cooling functions
are disabled.
"OFF or "Close" requests are
issued as appropriate to the
following functions;
a. Compressor staging
/Chilled Water control
b. Heat operation
c. Supply fan control and
proof of operation.
d. Return fan control and proof
of operation.
e. Exhaust fan control and
proof of operation
f. Exhaust actuator control
g. Economizer actuator control
h. IGV / VFD control
RESET REQUIRED
(PAR) An automatic reset
occurs after the Supply Air
Reheat SETPOINT input
returns to within range for 10
continuous seconds, or after a
different, valid Supply Air
Reheat SETPOINT
selection source is user
defined.
(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.
(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.
(PAR) An automatic reset
occurs after the designated
Supply Air Temperature input
returns to its allowable range.
In order to prevent rapid
cycling of the Diagnostic, there
is a 10 second delay before
the automatic reset.
(PMR) A manual reset is
required anytime after the
Diagnostic is set. The
Diagnostic can be reset by the
Human Interface or Tracer, or
by cycling power to the RTM.
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