X30 Owner’s Handbook
Page 23
COOLANT FLOW (03) & OVERHEAT (04) Diagnostic Codes
Proper operation of the heater requires a sufficient amount of coolant in the system and coolant flow.
Problems with the vehicle and PROHEAT coolant system are indicated by the above diagnostic codes.
The OVERHEAT Code 04 will cause the X30 PCM to go into Lockout mode. Lockout mode protects the heater
from damage and the coolant system must be checked thoroughly before clearing the OVERHEAT Code 04.
After checking the coolant system Power to the X30 PCM must be removed and reapplied to exit
Lockout mode and clear the OVERHEAT code 04. See Installation and Service manual SL9211 at
www.proheat.com for details.
Common issues to look for:
• For at least 3 gallons of coolant in the system, ensure the radiator is topped up
• That coolant line shut off valves are open
• That sleeper heater coolant controls are in the full heat position
Proheat Auxiliary
Sleeper Heater Kit
Engine
Dash heater
Return to engine
Supply to PROHEAT
This is an example only. Vehicle may have specialized plumbing. Contact your Distributor/Dealer for details.
Troubleshooting
Function Diagnostics
c
heck
Summary of Contents for X30
Page 1: ...OWNER S HANDBOOK ...
Page 28: ...X30 Owner s Handbook Page 27 Notes ...