Nuvair D35 SmoothStart Compressed Gas User Guide
- June 17, 2024
- Nuvair
Table of Contents
Nuvair D35 SmoothStart Compressed Gas
Product Information
Specifications:
- Manufacturer: NUVAIR
- Product Name: SMOOTH START
- Model: Not specified
- Power Input: 120-230 volts
- Indicator Lights: Green, Red
- Operation: Compressor starting and operation troubleshooting
Product Usage Instructions
Check Wiring and Connections:
The most common mistake is incorrect wiring. Follow the diagram provided
and ensure all connections are tightly secured.
LED Troubleshooting Indicator Lights:
- Power Off: Ensure power has been off for 5-7 minutes before turning it back on.
- Indicator Reading: After turning the system back on, observe the indicator lights to determine the error code.
- Fault LED Flashing: Count the flashes to identify the type of fault detected.
Error Code Chart:
| LED Color | Error Type | Description |
|---|---|---|
| Steady Green | Normal POWER (D35) | Indicates power to the board, not a problem |
indication.
FAQ:
- Q: What should I do if I encounter a “Stall” fault?
A: A stall fault can indicate line voltage collapse, improper wiring, or issues with the compressor or run capacitor. Check for these issues and rectify them before restarting the compressor.
Check Wiring and Connections
The most common mistake is incorrect wiring. Check that wiring is correct with the diagram you selected and make sure all connection points are tightly connected.
LED Troubleshooting Indicator Lights
Be sure power has been removed for at least 5-7 minutes before powering back
on. Once your system is back on, SmoothStart will record the error and allow
you to see which indicator light or combinations of lights are
lit.
Use the chart below to determine the error code
The fault LED will flash whenever a fault occurs. Count the flashes to
determine the type of fault detected.
LED INDICATIONS
| FLASH | FAULT | LED INDICATIONS |
|---|---|---|
| Steady Green | Normal Operation | POWER (D35): |
A steady green LED indicates power to the board. It is not an indication of a problem.
1 RED| Unexpected Current| FAULT (DS1): Unexpected Current
This fault occurs when SmoothStart is first powered and a high current is
detected. There is most likely a wiring problem that must be corrected before
attempting another start.
2 RED| Over Current| This fault can occur during the start or while the
compressor is in operation. Run currents over 30 amps will cause a fault.
Faults during a start can mean a wiring or compressor problem.
3 RED| Short Cycle Delay| The short cycle is used as an indication that power
was removed and then reapplied before the short cycle timer has expired. This
fault will clear itself and start the compressor when the timer expires.
Systems must wait three minutes from the time the compressor stops to restart
the compressor.
(NOTE: Cutting JP2 disables the short cycle timer. This should NOT be done in most systems and can cause stall problems during the start.)
4 RED| Open Overload| Open overload indicates the compressor overload has
opened. This fault is typically caused by a condenser problem such as blocked
airflow or no water flow.
5 RED| Stall| Stalls can occur both during the start and operation. This can
indicate a collapse of line voltage, improper wiring, or a bad compressor or
run capacitor.
6 RED| Wrong Voltage| A SmoothStart configured for use only on 120-volt
systems is being used on a 230-volt system.
7 RED| No Signal from Start Winding| The orange wire is not connected to the
start winding or the start winding is open. Check for wiring errors or loose
connections.
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