RTHD and RTAC - Trane

Starter
Solid State - RTHD Only
CH530 provides an interface with Non-Communicating Solid State Starter.
The following points of interface are provided.
Start contact closure output: This contact closure output will be closed when the
compressor motor is to run and opened when the compressor motor is not to
run. This output will be latched to prevent chatter of this command to the starter
Up To Speed contact closure input: This contact closure input is closed when
the solid state starter has started and accelerated the compressor motor. Failure
of this input to close within the maximum acceleration time will cause the "Motor
Failed to Accelerate" diagnostic to be called out.
Starter Fault contact closure input: This high voltage binary input will be open
when the solid state starter system is not powered and when the solid state
starter has an active fault. It will be high voltage (115 VAC) during normal
operation of the solid state starter. This input shall be ignored for five seconds
following power-up. After the first five seconds, if this input voltage is high, a
Starter Fault diagnostic shall be called out.
The sequence of a Solid State Start is shown in Figure 29
Refer to RTHD-SVD01A-EN for IT Solid State Starter Troubleshooting.
Refer to RTHD-SVD02A-EN for RediStart Solid State Starter Troubleshooting.
RTHD Sequence of Operation:
Starting Non-Communicating Solid State Starter
Waiting
To Start
Check for At Speed Input Opened
(1 Second)
Energize Stop and Start
Relays
Confirm Individual Phase
Currents are > 10% RLA
within 2.6 seconds
Accelerating
Compressor
(6 to 64 Seconds (Default 7 sec))
Starting Compressor
Run Command to Starter Module
Figure 29.RTHD Sequence of Operation Solid State Start
Confirm At Speed Input within
Maximum Acceleration Timer
(Default 7 seconds)
Running
Running
RLC-SVD05A-EN 43