Method 2; Service Failure; Simultaneous Heat And Cool Failure; Resetting Cooling And Heating Lockouts - Trane TC*150-301 Installation Operation & Maintenance

Troubleshooting

Service Failure

1. If the supply fan proving switch has closed, the unit will not operate (when connected to RTOM),
2. Clogged filter switch has closed, check the filters.

Simultaneous Heat and Cool Failure

1. Emergency Stop is activated.

Method 2

The second method for determining system status is done by checking voltage readings at the
RTRM (J6). The system indication descriptions and the approximate voltages are listed below.
System Failure
Measure the voltage between terminals J6-9 & J6-6.
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Heat Failure
Measure the voltage between terminals J6-7 & J6-6.
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Cool Failure
Measure the voltage between terminals J6-8 & J6-6.
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Service Failure
Measure the voltage between terminals J6-10 & J6-6.
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To use LED's for quick status information at the unit, purchase a BAYSENS010B ZSM and connect
wires with alligator clamps to terminals 6 through 10. Connect each respective terminal wire (6
through 10) from the Zone Sensor to the unit J6 terminals 6 through 10.
Note: If the system is equipped with a programmable zone sensor, (BAYSENS019A,

Resetting Cooling and Heating Lockouts

Cooling Failures and Heating 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.
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check the fan motor, belts, and proving switch.
Normal Operation = approximately 32 VDC
System Failure = less than 1 VDC, approximately 0.75 VDC
Test Mode = voltage alternates between 32 VDC & 0.75 VDC
Heat Operating = approximately 32 VDC
Heat Off = less than 1 VDC, approximately 0.75 VDC
Heating Failure = voltage alternates between 32 VDC & 0.75 VDC
Cool Operating = approximately 32 VDC
Cool Off = less than 1 VDC, approximately 0.75 VDC
Cooling Failure = voltage alternates between 32 VDC & 0.75 VDC
Clogged Filter = Approximately 32 VDC.
Normal = Less than 1 VDC, approximately 0.75 VDC
Fan Failure = voltage alternates between 32 VDC & 0.75 VDC.
BAYSENS020A or BAYSENS023A), the LED indicators will not function while the
BAYSENS010A is connected.
RT-SVX25C-EN