Resetting Cooling And Ignition Lockouts; Zone Temperature Sensor (Zsm) Service Indicator - Trane Voyager CV Installation And Maintenance Manual

Diagnostics
FAIL or SERVICE (or an appropriate combination) if a
diagnostic is present.
HEAT (YC only)
1. TCO1, TCO2, or TCO3 has opened.
2. IGN Module lockout (see gas heat section for
troubleshooting).
COOL
1. Discharge air sensor (DTS) is open, shorted, or has
failed.
2. Zone temp input (RTRM J6-1) is open, shorted, or failed
during an unoccupied mode. If the unit has a default
mode input (jumper from RTRM J6-2 to RTRM J6-4, a
valid zone temp input is needed for unoccupied
heating, MWU and DWU.
3. CC1 or CC2 24 VAC control circuit has opened 3 times
during a cooling mode. Check CC1, CC2 coils or any
controls in series with the coils (winding thermostat,
HPC, circuit breaker auxiliary contacts).
4. LPC 1 or LPC 2 has opened during the 3 minute
minimum "on" time during 4 consecutive compressor
starts. Check LPC 1 circuit by measuring voltage from
RTRM J1-8 to chassis ground. Check LPC 2 circuit by
measuring voltage from RTRM J3-2 to chassis ground.
If 24 VAC is not present, the circuit is open. 24 Vac
should present at these terminals at all times.
SERVICE
1. The supply fan proving switch (FFS) has failed to open
within 40 seconds after the fan starts or has closed
during fan operation.
COOL + SERVICE
1. Static Pressure Transducer output voltage at RTAM J1-
3 is less than 0.25Vdc. The transducer output is open,
shorted, or the transducer is reading a negative supply
air pressure.
HEAT + COOL
1. The Emergency Stop input (TB1-5 and TB1-6) is open.
Check this input at the RTRM by measuring voltage
from RTRM J1-12 to chassis ground. 24 Vac should be
present whenever the Emergency Stop input is closed.
2. Outdoor air sensor (OAS) input is open, shorted, or has
failed.
HEAT + COOL + SERVICE
1. Static Pressure High Duct Static Trip. The static
pressure has exceeded 3.5" W.C. three consecutive
times.
1. Smoke Detector input active.
2. Supply Air Temperature Failure on units with
modulating dehumidification
106
3. Entering Evaporator Temperature Failure on units with
modulating dehumidification.
4. RTDM Communication Failure on units with
modulating dehumidification.

Resetting Cooling and Ignition Lockouts

Cooling Failures and Ignition Lockouts are reset in an
identical manner. Method 1 explains resetting the system
from the space; Method 2 explains resetting the system at
the unit.
Note: Before resetting Cooling Failures and Ignition
Lockouts check the Failure Status Diagnostics by
the methods previously explained. Diagnostics will
be lost when the power to the unit is disconnected.
Method 1
To reset the system from the space, turn the "Mode"
selection switch at the zone sensor to the "Off" position.
After approximately 30 seconds, turn the "Mode"
selection switch to the desired mode, i.e. Heat, Cool or
Auto.
Method 2
To reset the system at the unit, cycle the unit power by
turning the disconnect switch "Off" and then "On" .
Lockouts can be cleared through the building
management system. Refer to the building management
system instructions for more information.
Zone Temperature Sensor (ZSM) Service
Indicator
The ZSM SERVICE LED is used to indicate a clogged filter,
an active Smoke Detector, or a Fan Failure trip.
Clogged Filter Switch
This LED will remain on 2 minutes after the Normally Open
switch is closed. The LED will be turned off immediately
after resetting the switch (to the Normally Open position),
or any time that the IDM is turned off.
If the switch remains closed, and the IDM is turned on, the
SERVICE LED will be turned on again after the 2 (±1)
minutes.
This LED being turned on will have no other affect on unit
operation. It is an indicator only.
Smoke Detector Switch
The LED will flash anytime that the N.O. Smoke Detector
input is closed and will be reset anytime that the input is
returned to its N.O. state. During an Active Smoke Detector
trip the unit will be shut down.
Fan Failure Switch
The LED will flash 40 seconds after the fan is turned "On"
if the Fan Proving Switch is not made. This LED will remain
flashing until the unit is reset by means explained above.
RT-SVX34F-EN