InstroTek FAQ / CoreDryPRO FAQs

CoreDryPRO FAQs

Here you will find answers to questions for identifying, diagnosing, and resolving common CoreDryPRO issues. It is designed for both end-users and support teams to help streamline the troubleshooting process.

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Common Questions

Why will my CoreDryPRO not power on?
  • Confirm the unit is plugged in.
  • Test the wall outlet with another device (e.g., lamp, fan).
  • Check the facility’s circuit breaker.
  • Inspect the fuse on the power module (rear of unit). Replace if blown. If fuses continue to fail, verify the fuse rating is correct.
Why does the unit end cycle early?
  • Verify vacuum readings match:
  • Place a Torr gauge in the sample chamber and run a cycle.
  • Compare readings with the display. If variance is greater than 1 mmHg, adjust “Pressure Offset” in the System Menu (Option 16).
  • Run the unit with an empty chamber. Display reading should reach 6 mmHg or lower.
Why is the unit running continuously but never indicating that the sample is dry?
  • CoreDryPRO registers “sample dry” only when chamber pressure reaches the Pressure Set Point (default: 7 mmHg) during a Bypass Cycle.
  • Confirm the unit is entering Bypass mode (look for “Bypass Cycle” on screen and illuminated indicator). Depending on sample moisture, this may take up to 20 Vacuum/Flow cycles.
  • Run with the chamber empty. The first Vacuum Cycle must reach at or below the Bypass Pressure set point (default: 12 mmHg). If not, contact InstroTek.
Why is drying taking longer than expected?
  • Run empty chamber; display should reach 6 mmHg or lower.
  • Confirm the Cold Trap bottom becomes cold during idle. (Without a probe, place drops of water inside—water should freeze.)
  • Ensure the unit enters Bypass mode once the Bypass Pressure setpoint is reached.
Why is the unit not entering Bypass mode?
  • Check Max Cycles setting in System Menu (should be set to 10).
  • Run with an empty chamber. Verify minimum pressure in the first Vacuum Cycle is at or below 12 mmHg. If not, contact InstroTek.
Why are Asphalt samples melting, burning, or deforming?
  • Verify vacuum readings match using a Torr gauge. Adjust “Pressure Offset” if necessary.
  • Reduce Plate Limit setting in the System Menu (default: 90°C).
  • Confirm chamber vacuum reaches below 6 mmHg.
  • Ensure Bypass mode is functioning.
  • For some samples, pre-soaking before drying may help ensure uniform moisture distribution.
The vacuum is insufficient. What do I do?
  • Confirm lids are properly seated on both the sample chamber and Cold Trap.
  • Clean chamber and replace tank port filters.
  • Ensure pump oil fill cap is installed and tight.
  • Verify oil drain valve is fully closed.
  • Confirm Cold Trap Baffle is seated correctly.
  • Run Self-Test; confirm all electrical components draw proper current.
  • Inspect chassis for loose or pinched hoses.
  • Verify vacuum with an analog gauge; compare to display reading and adjust “Pressure Offset” if variance exceeds 1 mmHg.
  • If issue persists, contact InstroTek (919-875-8371).
Why will the vacuum not release?
  • Ensure the unit is powered on.
  • Run Self-Test to confirm all electrical components receive power.
  • Check valves for blockages or failure to open.
  • As a last step, open the chassis and disconnect a hose from the tank.
    Warning: This will rapidly release vacuum and may cause chamber lids to lift.
  • If unresolved, contact InstroTek (919-875-8371).
I see a warning screen: oil, tank filter, or exhaust filter needs replacement. What does that mean?
  • Replace components following the procedure in the manual.
Why is the touchscreen unresponsive?
  • Recalibrate screen per manual instructions.
  • Restart CoreDryPRO and press the InstroTek Logo during the “Splash Screen” to access calibration.
  • Alternatively, restart and tap the screen repeatedly until calibration mode appears.
  • If issue persists, contact InstroTek (919-875-8371).
Why does the pump turn on immediately when the unit is powered on?
  • Ensure only the Main Power Cord is connected.
  • The AutoRice power cord should only connect between CoreDryPRO and an AutoRice unit—not directly to facility power.
  • Unplug the AutoRice cord, restart the CoreDryPRO, and resume normal operation.

General

Parts List (Common Replacements & Repair Kits)
  • 419.0005 – Oil, 1 quart
  • 628.0408 – Power Supply
  • 709.0131 – Power Interface PCB
  • 709.1006 – Hot Plate
  • 709.1059 – Thermoelectric Kit
  • 709.1101 – Pump with fittings
  • 709.1130 – Touchscreen Assembly
  • 709.1135 – AutoRice Valve Assembly
  • 709.1149 – Inline Heater Valve Assembly
  • 709.1150 – Vacuum Valve 1 Assembly
  • 709.1151 – Vacuum Valve 2 Assembly
  • 709.1152 – Bypass Valve Assembly
  • 977.1004 – Tank Filters (12-pack)
  • 977.1005 – Exhaust Filter KB/RA

Troubleshooting

Escalation Process

If issues persist:

  1. Create a customer support ticket.
  2. Contact InstroTek Technical Support: 919-875-8371.