Error message: “17: Overtemp H-Brdg”
Problem:
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):
- Clean all filters, replace filter cartridges
- Clean the solenoid valve Y126: Switch off the cooling unit and disconnect the water inlet to the Pacemaker HF and drain the water. Remove coil and the piston unit with a torx screwdriver. Blow out the valve and clean the rubber seal. Reassemble the valve properly: Insert the piston unit with the spring on top, so the rubber seal is closing the outlet hole.
- Disconnect the return hose from the water station: There is a reducer in the hose ! The hole may be blocked. Blow out/clean.
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:
- Check relay RL5 on the main board: If the temperature rise up to 35°C it should switch on. The LED LD20 indicates whether the relay is switched on.
- If LD20 is on and still no power on terminal 9, check the jumper behind the relay: The jumper must connect both pin.
- Possibly the relay is broken. Exchange the relay.
