Table of Contents
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4-14
Operation
Fault LED (red)
Part 1024496_06
How F1, F2, and F3 Faults are Handled
When the melter detects an F1, F2, or an F3 fault:
1. The automatic scan stops and the melter begins to monitor the potential
fault for up to two minutes. The ready and heater LEDs remain on during
the two‐minute time period. If, at any time during the two‐minute period,
the melter detects that the fault condition no longer exists, the melter will
return to the automatic scan mode.
2. The LED on the affected component key (tank, hose, or gun) turns on to
indicate the type of component that has, or is, failing.
3. The right display indicates the type of fault (F1, F2, or F3).
4. The left display indicates, as follows, the component that has, or is,
failing.
S
If the LED on the tank key is on, the left display will indicate either 1
for the tank or 2 for the manifold.
S
If the LED on the hose or gun key is on, the left display will indicate
the number of the affected hose or gun.
5. If the fault condition still exists at the end of the two‐minute monitoring
period, the ready LED will turn off, the red fault LED will turn on, the
heaters turn off, and the melter records the fault in the fault log. Refer to
To review the fault log earlier in this section.
E 2014 Nordson Corporation
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Table of Contents
Troubleshooting
Need help?
Do you have a question about the ProBlue P4 and is the answer not in the manual?
Questions and answers
The pump of the glue bath is not pumping the glue out to the pipes and to the glue gun, what can i do to get the pressure?
To fix the glue pump issue on a Nordson ProBlue P4 and restore pressure to the pipes and glue gun, follow these steps:
1. Check for Leaks – Locate and repair any air leaks in the system.
2. Verify Air Pressure – Ensure the air pressure to the pump is greater than 0.7 bar (10 psi) and adjust if necessary.
3. Inspect the Tank – Confirm that the tank is not empty; if it is, fill it with adhesive and allow it to reach operating temperature.
4. Check the Isolation Valve – Ensure the shut-off valve is open.
5. Inspect the Return Port – If hot melt is returning to the tank through the return port behind the tank screen, check and clean the tank outlet and crossover tube or replace the manifold.
6. Replace the Pressure Discharge Valve – If necessary, replace the pressure discharge valve with P/N 1028308.
Following these troubleshooting steps should help restore pressure and proper function to the glue pump and gun system.
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What is F4/A problem?
What is A/ F4 Foult
An F4 fault on the Nordson ProBlue P4 glue machine means the system has detected a fault that can be classified as either fatal or nonfatal.
- Fatal F4 Fault: The fault LED stays on, and the melter stops functioning completely.
- Nonfatal F4 Fault: The fault LED turns on for five seconds, but the heaters and pump continue to operate normally. However, nonfatal faults affect the internal clock and optional I/Os.
The fault is recorded in the fault log, and further troubleshooting details can be found in Section 6 of the manual.
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Reason why Nordson Problue 4 leaking adhesive from the back?
Our glue keeps on feeling when level in the glue tank is ok
The glue may keep leaking from the Nordson ProBlue P4 even when the tank level is okay due to a leak in the system. The manual advises locating and repairing the leak. Additionally, the discharge valve may be faulty and need replacement, or the outlet of the tank and crossover tube may need cleaning.
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Our Problue 4's pump is reciprocating when no glue is being dispensed. Roughly once per second. No glue hoses or tips are leaking. unit is still working for now.
The Nordson ProBlue P4 pump may be reciprocating without dispensing glue due to a nicked, cut, deteriorated, or deformed pump seal. The issue could have occurred during reassembly. It is recommended to apply Parker lubricant (P/N 273139) and ensure proper reinstallation of the O-ring and pump seal after the piston is reinstalled but before installing the insulator and pump frame.
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