Trane IntelliPak I - Page 127

RT-SVP04F-EN 127
System Testing & Troubleshooting
Condenser Pessure Sensor
Failure Ckt #2
Problem:The Circuit-2
Condenser Pressure input
voltage is out of range.
Check wiring between Circuit-
2 Condenser Pressure sensor
and MPM. If correct verify
correct voltage on sensor
input on MPM.
Input voltage is out of range:
Input < 0.625 V or Input >
4.80 V.
Compressor and condenser
operation for Circuit -2 is
locked out until sensor value
returns in range.
(PAR) An automatic reset
occurs after the Circuit-2
Condenser Pressure input
returns to within range for 10
continuous seconds.
Cond Sump Min Level or
Drain Fail
Problem: The Cond Water
Sump Fill Relay is energized,
the 30-minute fill timer
expires and the Cond Water
Sump Min Level Input is not
closed.
Anytime there is an acitve
Cond Sump Drain request and
the Cond Sump Min Level
Input is closed a 5 minute
timer is started. This timer is
continually reset whenever the
Cond Sump Min Level Input is
open.
Check: wiring from the MCM to
the Sump Fill valve, water flow
to the sump, sump min level
switch and associated wiring.
The Cond Water Sump Fill
Relay is energized, the 30-
minute fill timer expires and
the Cond Water Sump Min
Level Input is not closed.
When the Cond Water Sump
Fill Relay is energized, a 30-
minute timer is started. This
timer is continually reset
whenever the Cond Water
Sump Min Level input is
closed.
All compressor circuits are
locked out due to inability to
determine if the sump has
sufficient water level.
De-energize the Heat relay.
(PAR) An automatic reset
occurs after the Cond Water
Sump Min Level Input is closed
for 10 continuous seconds.
Once the Cond Sump Min
Level is open for 10
continuous seconds clear
diagnostics and compressor
lockouts.
Condenser Sump Pump
Manual Fail
Problem: Sump pump possibly
not operative.
Check: wiring to sump pump,
contactor, and auxillary
contacts.
Sump Pump contactor
auxiliary contacts do not close
(state change), within 6
seconds, when the pump is
requested ON for mechanical
cooling, or are open for 6
continuous seconds during
compressor operation.
A compressor lockout is
generated on all circuits.
(PMR) A manual reset is
required
anytime after the Diagnostic is
set to re-enable compressor
operation. The Diagnostic can
be reset by the Human
Interface or Tracer, or by
cycling power to the RTM.
Cond Sump Max Level
Failure
Problem: The condenser sump
water is reaching an
undesirable level and is
reaching the maximum level
sensor.
The condenser sump pump
water level reaching the Cond
Sump Max Level switch is
considered an undesirable
condition indicating a problem
with the mechanical float valve
or some other water control
mechanism.
Generate a Cond Sump Max
Level Failure auto reset
diagnostic.
De-energize the Cond Sump
Fill Relay.
(PAR) Once the Cond Sump
Max Level input is open for
120 continuous seconds
the diagnostic will be cleared
and the fill relay will be
energized.
DIAGNOSTIC DISPLAYED REASON FOR DIAGNOSTIC UCM’S REACTION RESET REQUIRED