The cold plate of the IGBT modules in the pacemaker HF (V1&V2) has reached the maximum temperature limit of 55°C.
In normal operation, solenoid valve Y126 should open at 35°C and close again when the cold plate has cooled down to 30°C.
Note: If you push the down arrow button, you can observe all values, including the current temperature values.
Possible Causes & Resolutions:
Check following as soon as the solenoid valve Y126 switches on (when cold plate has reached 35°C):
Note: In the Pacemaker HF V1 devices, the solenoid valves are integrated in the Pacemaker HF housing. The system works similar, even the solenoid valve type is the same.
If the solenoid valve Y126 does not switch on, although the temperature exceed 35°C, check the following points:
Scroll down in the display menu until you reach the temperature display. Observe, if after crossing the switching threshold, the temperature doesn’t change, that the solenoid valve is blocked (when the 2nd thresholds are reached the message “over- or undertemperature” will be displayed).
NOTE: The error message “Ths too low (Ths = Temperature Heatsink)” might be an indication for a contaminated valve.
Possible reason choke coil defective
– Check the cooling-water-inlet.
– Check the “Ths” and “Tamb” on the display.
– Check the small fans of the Pacemaker
The error “Ths too low” means temperature heat sink (copperplate) too low. If the copper plate is too cold. It can damage the unit, if some condensation water flows to the electronic power parts.
Check if the valve closes correctly and clean the valve.
If you reassemble the valve, make sure you do it the right way (see picture)
Correctives 1 – Too much heat during the first part of the curing process:
1.1. The tin flow has to to be only as wide as the width of the powder and / or lacquer stripe and not more (usually around 15 mm for food and aerosol cans)!
- This width covers also lateral shifting can bodies during daily production!
- The internal powder must have a low melting point, starting from about 180°C!
- Most commercially available and good powder coats are fulfilling this demand For further information for recommended powders, please contact Can Man.
1.2. The conveyor speed in the oven is too high, therefore the curing time too short!
– Distances between the cans of more than 1/2 canbody height is a reduction in curing time of 25% (or from 5 sec. to only about 3,8 sec.!)
1.3. The adjustment of the coil to the can bodies is wrong.
1.4. The curing length is too short (before order a longer curing system, please follow first the Correctives 2 and 3!)
Corrective 2 – The wet lacquer application is not constant, too thick or too thin!
2.1. Especially for induction curing system, with shorter curing time, a constant film thickness is required!
- Please note that a constant and a “as thin as possible” lacquer application is essential not only onthe curing effect, but it also reduces the lacquer cost!
2.2. The can body must be round – within standard tolerance -, overlap begin and end must be equal!
2.3. Depending on the configuration, rubber roller or steel rollers must be used!
- For further information and / or support contact Can Man.
2.4. The speed of the application roller is wrong, compared to the passing can bodies!
- Generally can be said, that a too high application roll speed leads to worse results than a too slow one.
- Depending on steel or rubber rollers different speed than can body speed might be used, but must be controlled and monitored.
2.5. The material and / or the form of the rubber/steel roller profile is wrong!
- For the use of a steel roll (longer lifetime) we urgently recommend to have a “supporting conveyor “under” can body (available at Can Man)
Corrective 3 – Wrong wet lacquer type in use:
3.1. Not every wet lacquer type is applicable for induction curing system due to the fact that the heat up ramps are much faster than with a gas curing system
- For a list of recommended (and pricewise competitive!) lacquers contact Can Man
3.2. The correct viscosity and therefore the proportion of solvent is most important for a non-porous side seam protection.
- For further information and / or support contact Can Man.
Don’t worry, due to the induction process this is absolutely normal.
The reset LED flashes and a warning is shown!
If the reset LED flashes, then the system works in a critical state. The unit is still entirely functional, but it should be a hint for the operator to do something against the warning.
Contact Can Man for advice!
Sparking on the induction coil
HF filter not set correctly (to high)
Check all insulations of the coil and C-bar.
pH value: 7–9
Conductivity: 50–60 µS/cm
Total hardness: < 14 °dH
Filter: max 150 µm
The IC, which control the analog output, must be replaced. Please request support from Can Man!
The water flow of the coil is too low!
The standard setting for this error is 3l/min (can be found in the basic setup “rotary minflow”).
The actual water flow is shown in the display. Press down from the main menu on the display until you find the flow coil.
You have to switch “ON” the curing to open the water valve!
Check for possible causes:
Clean the water valves:
Therefore disconnect the water inlet to the Pacemaker HF and blow out the water. Take off the coil and open the valve with a torx screwdriver. Blow out the valve and clean the rubber.
Reassemble the valve properly (insert the closing block with the spring on top, so the rubber is closing the outlet hole.
Clean the rotary flow unit. Follow the instructions below.
If were not successful, replace the rotary flow meter => CM article No 007906
The software for the Pacemaker HF is memorized on a small processor board. For an update with new software, you need to change this board.
Before you start to change the board write down the voltage value you were using for your application.
Switch off the main switch of PowerCURE™
Wait 5 minutes, before you remove the cover. Capacitors with high voltage inside!
Remove the processor board carefully by hand. Do not use any tools for that.