Trane IntelliPak I - Page 140

140 RT-SVP04F-EN
System Testing & Troubleshooting
SCM Communications
Failure
Problem: The RTM has lost
communications with the
SCM.
Check: Check field/unit wiring
between RTM and SCM.
The RTM has lost
communications with the SCM.
A “Lockout” request is sent to
the Compressor Staging
Control function. And a fail-
safe function in the SCM will
cause all SCM outputs to be
zeroed and de-energized.
(PAR) An automatic reset
occurs after communication
has been restored.
Space Pressure Sensor
Failure
Problem: The Space Pressure
input signal is out of range.
Check: Check field/unit wiring
between Sensor and ECEM.
The unit is reading a signal
that is out of range for the
Space Pressure transducer
input (During calibration: V <
40 mV or V > 420 mV, During
operational times: V < 40 mV
or V > 0.75 V).
The Space Pressure Control
function is disabled, and the
exhaust fan and the exhaust
damper actuator are
controlled as if the unit did not
have Statitrac. Default
exhaust enable point is used.
(PAR) An automatic reset
occurs after the designated
Space Pressure transducer
sends a signal within range for
10 continuous seconds.
Space Static Pressure
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 4
analog inputs on GBAS, this
message will occur.
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).
The default Space Pressure
SETPOINT will become the
active Space Pressure
SETPOINT.
(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 Sensor and RTM.
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)
The IGVs will drive closed, and
the following functions are
disabled;
a . S A P r e s s u r e C o n t r o l
b. SA Static Pressure Limit
(PAR) An automatic reset
occurs after the SA Pressure
input returns to its allowable
range for 10 seconds.
Supply Air Pressure
SETPOINT Failure
Problem: The Supply Air
pressure input signal is out of
range.
The Supply Air Pressure
SETPOINT input is sending a
signal that is out of range
(Input < 1.0 IWC or Input >
4.3 IWC)
The default Supply Air
Pressure SETPOINT will
become the active Supply Air
Pressure SETPOINT.
(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.
DIAGNOSTIC DISPLAYED REASON FOR DIAGNOSTIC UCM’S REACTION RESET REQUIRED