If the engine coolant heater fails, check the following before
troubleshooting the heater.
Check electrical connections and the fuses (in the battery box and
engine coolant heater boxed enclosure). Ensure that the crane's
batteries are charged.
Check the fuel source.
Check for coolant flow from the crane's engine coolant system.
The engine coolant heater is equipped with self-diagnostic capability.
When engine coolant heater faults occur, relevant fault codes will be
automatically displayed on the seven day timer in place of the time of day
Timer Fault Retrieval. The Espar seven day timer displays fault codes generated by the heater
control unit. This function is automatically activated when the heater is experiencing problems.
Fault codes appear on the LCD screen display of the seven day timer.
Fault codes can be interpreted from Table J-2, Fault Codes.
Retrieving Fault Codes
When a fault occurs, a fault code will automatically be displayed in place of the time of
day display on the seven day timer located in the carrier cab, above the front console.
Refer to Table J-2 to interpret the displayed fault(s).
There is a fault code retrieval device (Espar part number CA1 05 020)
available for the engine coolant heater. The device has the capability to
store and display up to five fault codes. If required, the device should be
procured locally and can be ordered online at http://www.espar.com.
Instructions for using the fault code retrieval tool can be downloaded at: