Diagnostics (Vav Only); Resetting Cooling And Ignition Lockouts - Trane Voyager Commercial Installation & Operation Manual

Diagnostics (VAV only)

If only one diagnostic is present, refer to that diagnostic. If more than one diagnostic is present,
refer to combination diagnostics such as COOL + HEAT as appropriate. On a BAYSENS119*, the
display will show HEAT FAIL or COOL 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
3. CC1 or CC2 24 VAC control circuit has opened 3 times during a cooling mode. Check CC1, CC2
4. LPC 1 or LPC 2 has opened during the 3 minute minimum "on" time during 4 consecutive
SERVICE
1. The supply fan proving switch (FFS) has failed to open within 40 seconds after the fan starts or
COOL + SERVICE
1. Static Pressure Transducer output voltage at RTAM J1-3 is less than 0.25VDC. The transducer
HEAT + COOL
1. The Emergency Stop input (TB1-5 and TB1-6) is open. Check this input at the RTRM by
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
1. Smoke Detector input active.
2. Supply Air Temperature Failure on units with modulating dehumidification
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
RT-SVX34C-EN
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.
coils or any controls in series with the coils (winding thermostat, HPC, circuit breaker auxiliary
contacts).
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.
has closed during fan operation.
output is open, shorted, or the transducer is reading a negative supply air pressure.
measuring voltage from RTRM J1-12 to chassis ground. 24 VAC should be present whenever
the Emergency Stop input is closed.
consecutive times.
by the methods previously explained. Diagnostics will be lost when the power to the unit
is disconnected.
Diagnostics
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