Trane IntelliPak I Programming, Troubleshooting Manual page 144

System Testing & Troubleshooting
DIAGNOSTIC DISPLAYED
Velocity Pressure Sensor
Failure (Front or Back)
Problem: The Velocity
pressure voltage input is out
of range.
Check wiring from VCM and
sensor.
VOM Communications
Failure
Problem: The RTM has lost
communications with the
VOM.
Verify: Check field/unit wiring
between RTM and VOM.
UNIT MODULE
Multiple Circuit • Leaving Evap
Compressor Module Temperature Sensor
(MCM) (Ckt #1)
• Leaving Evap
Temperature Sensor
(Ckt #2)
• Entering Evap
Temperature Sensor
(Ckt #1)
• Entering Evap
Temperature Sensor
(Ckt #2)
• Saturated Condenser
Temperature Sensor
(Ckt #1)
• Saturated Condenser
Temperature Sensor
(Ckt #2)
• Sump Water Temp
(Ckt #1)
144
REASON FOR DIAGNOSTIC
The Velocity pressure voltage
input is out of range. During
the calibration cycle if the
voltage is less than 40mV or
greater than 420 mV. During
Operational time if the Voltage
is less than 40mV or greater
than 0.75V. Time to react is
greater than 10 seconds but
less than 20 seconds.
The RTM has lost
communications with the
VOM.
ANALOG INPUTS ANALOG OUTPUTS
• Condenser Fan Speed
(Low Ambient Ckt #1)
• Condenser Fan Speed
(Low Ambient Ckt #2)
UCM'S REACTION
Minimum air flow and Demand
Control Ventilation functions
revert to OA Damper Min
Position DCV functionality.
Economizer Min. Pos. reverts
to the position provided by the
OA Damper Min Position DCV
function.
Ventilation override actions
will not be allowed, and the VO
Output relay will be de
energized.
BINARY INPUTS
• Low Pressure Control
(Ckt #1)
• Low Pressure Control
(Ckt #2)
• Compressor Proving
(Ckt
#1)
• Compressor Proving
(Ckt
#2)
• Water Level Min
• Water Level Max
• Sump Pump Proving
• External Sump Drain
Request
RESET REQUIRED
(PAR) An automatic reset
occurs after the Velocity
Pressure input returns to
within range continuously for
10 seconds.
(PAR) An automatic reset
occurs after communication
has been restored.
BINARY OUTPUTS
• Compressor Relay
(K11)
• Compressor Relay
(K12)
• Compressor Relay
(K3)
• Compressor Relay
(K4)
• Condenser Fan 1A
• Condenser Fan 1B
• Condenser Fan 2A
• Condenser Fan 2B
• Condenser Water
Valve Ckt #1
• Condenser Water
Valve Ckt #2
• Sump Pump ON/OFF
• Sump Heat ON/OFF
• Sump Fill
• Sump Drain
RT-SVP04F-EN