Help in troubleshooting - fault lock-out

The following fault symptoms may occur in conjunction with the independent park heater/auxiliary heater:

• Independent park heater/auxiliary heater will not start (combustion air blower cannot be heard)
  
• Independent park heater/auxiliary heater switches off after one or several start attempts (combustion air blower can be heard but then switches off)
  

This may be attributed to a fault lock-out (set after 3 start attempts) due to following statuses:

• 1.) Undervoltage cutout triggered
  
• 2.) Overheating protection function triggered
  
• 3.) Fault lock-out due to insufficient fuel
  

Under certain conditions, the following may provide a remedy to the individual fault symptoms:

• Re: 1.) Check battery status and charge by alternator (Attention: Repeatedly driving short distances can lead to problems; explain situation to customer accordingly)
  
• Re: 2.) Cancel fault lock-out and/or overheating protection by deleting fault code memory of independent park heater/auxiliary heater. Check all hose lines for bends and leaks.
  
• Re: 3.) Cancel fault lock-out by deleting fault code memory of independent park heater/auxiliary heater. If the independent park heater/auxiliary heater does not receive fuel it attempts to start 3 times and then sets the fault lock-out (Attention: Ensure effective fuel supply with fuel level at reserve or low).
  
  

Important: It is not possible to activate the independent park heater/auxiliary heater if a fault code for the independent park heater/auxiliary heaterwith K-bus is stored in the IHKA control unit (E38). In this case, first delete the IHKA fault code memory.Possible fault:

• 59 K-bus fault