Originally Posted by toneumanns
Mine did the same thing so they changed out the transfer box. Now a new problem has started, the gen will run all day when parked but will only run about 10 min when going down the road & it doesn't give any codes. Does anyone know if the Onans through a code for over heat conditions?
I have a Quiet Diesel 7500 which does have fault codes for overheating.
HIGH TEMPERATURE—FAULT CODE NO. 1 (Engine coolant or inverter heat sink temperature exceeded design limit)
Corrective Action: Check the second-level fault code by touching Stop. The second-level fault will be
either No. 33 or No. 34.
HIGH ENGINE COOLANT TEMPERATURE FAULT—CODE NO. 33 (Engine coolant temperature exceeded design limit)
1. Check the engine coolant level and add coolant and repair leaks as necessary (Page 20).
2. Check for and remove any objects blocking the air inlet or outlet openings in the bottom of the genset.
3. Reduce the number of appliances connected at the same time. (Note that high altitude and high ambient
temperature decrease engine cooling capacity.)
4. Clean and flush the cooling system to remove coolant passage fouling.
5. If the genset overheats only underway, see the coach manufacture regarding air baffles or other
means to direct cooling air into the genset.
HIGH INVERTER TEMPERATURE FAULT—CODE NO. 34 (Inverter heat sink temperature exceeded design limit*)
1. Check for and remove any objects blocking the air inlet or outlet openings in the bottom of the genset.
2. Reduce the number of appliances connected at the same time. (Note that high altitude and high ambient
temperature decrease cooling capacity.)
First-Level Fault Codes: The genset controllerprovides extensive diagnostics by causing the status indicator light on the Control Switch to blink in a coded fashion. Following a fault shutdown, the indicator light will repeatedly blink 1, 2 or 3 blinks at a time.
• One blink indicates shut down due to high temperature
• Two blinks indicates shutdown due to a loss of engine oil pressure
• Three blinks indicates shutdown due to some other abnormal condition.
Second-Level Fault Codes: For a 1-blink or 3-blink first-level fault code, one touch to Stop brings up a second-level fault code. This code consists of 1, 2, 3 or 4 blinks, a brief pause, and then 1 to 9 blinks. The first set of blinks represents the tens digit and the second set of blinks the units digit of the fault code number. For example, Fault Code No. 23 would appear
NOTE: Fault Code Nos. 1, 2 and 3 are first-level faults.
Avoid interpreting them as second-level Fault Codes
11, 22 and 33. The pauses between repetitions of the
fault code are longer than the pauses between the
tens and units digits of the the code. For example,
Fault Code 33 would appear as:
Restoring Fault Code Blinking: The fault code
stops blinking after five minutes. Press Stop three
times within five seconds to restore blinking. Note
that the last fault logged will blink, even after the
condition that caused the shutdown has been corrected.