Dieselheat RVC Controller Fault Codes

Flashing LED Faults

The RV-C Controller has an LED mounted on the loom. Common hardware faults (faults with the controller) or furnace faults (faults with the Eberspacher furnace) are displayed via flashing the LED. This is in addition to fault numbers which are transmitted to the screen.

Numerical Fault Code Listing From Screen Display

Water Heater Fault Codes

Error Code	LED Flashes	EB Fault Code(s)	Description	Cause
2 – 4		P000394	ADR button – Short circuit	Cable or button damaged.
9 – 0		P000316	Insufficient heat dissipation via coolant	Too many short heating operations.
13 – 21	1	P000307 P00030A	Eberspacher CAN communication error	Controller cannot communicate with the Eberspacher furnace
25 – 0	5	P00012B	Operating lock-out – too many safety timeouts	Control box locked after three failed starts.
25 – 11	3	P00012A	Safety time – exceeded	Startup exceeded maximum time.
26 – 11	2	P000125 P000126 P000127 P000128 P000129	Flame cutout – start process / control ranges 0–25%, 25–50%, 50–75%, 75–100%	Heater restarts max. 3 times. If successful, fault is cleared.
27 – 0	9	P000310 P000311	Control box/Heater cutout due to overvoltage	Voltage > 15 V for ≥ 20 s. Heater not functioning.
27 – 1	10	P000312 P000313	Control box/Heater cutout due to undervoltage	Voltage < 10 V for ≥ 20 s. Heater not functioning.
29 – 3		P000121	Flame sensor – Short circuit	Check cable continuity and damage. Measure resistance between BN (ch. 7) and BN (ch. 8).
29 – 4		P000122	Flame sensor – Short-circuit to Ub+	Check cable continuity and damage. Measure resistance between BN (ch. 7) and BN (ch. 8).
29 – 5		P000120	Flame sensor – Interruption	Check cable continuity and damage. Measure resistance between BN (ch. 7) and BN (ch. 8).
30 – 2		P000114	Possible risk of overheating (implausible signal)	Too large temperature difference between inlet and outlet sensor. Displayed only if heater is operating and outlet temp ≥ 80 °C.
30 – 3		P000101	Water outlet sensor – Short circuit	Fault in water outlet sensor. Check cables for continuity, short circuit and damage. Measure resistance between RD (ch. 9) and RD (ch. 10).
30 – 3		P000111	Water inlet sensor – Short circuit	Displayed only if heater is operating and outlet temp ≥ 80 °C. Check cables for continuity, short circuit and damage. Measure resistance between BU (ch. 5) and BU (ch. 6).
30 – 4		P000102	Water outlet sensor – Short circuit after Ub+	Fault in water outlet sensor. Check cables for continuity, short circuit and damage. Measure resistance between RD (ch. 9) and RD (ch. 10).
30 – 4		P000112	Water inlet sensor – Short circuit after Ub+	Displayed only if heater is operating and outlet temp ≥ 80 °C. Check cables for continuity, short circuit and damage. Measure resistance between BU (ch. 5) and BU (ch. 6).
30 – 5		P000100	Water outlet sensor – Interruption	Fault in water outlet sensor. Check cables for continuity, short circuit and damage. Measure resistance between RD (ch. 9) and RD (ch. 10).
30 – 5		P000110	Water inlet sensor – Interruption	Displayed only if heater is operating and outlet temp ≥ 80 °C. Check cables for continuity, short circuit and damage. Measure resistance between BU (ch. 5) and BU (ch. 6).
31 – 3	7	P000201	Metering pump – Short circuit	Check metering pump lead harness for continuity, short circuit, damage.
31 – 4	7	P000202	Metering pump – short circuit downstream of +Ub or transistor error	Transistor or wiring fault.
31 – 5	6	P000200	Metering pump – Interruption	Check metering pump lead harness for continuity, short circuit, damage.
32 – 1		P000224	Electric motor – Current input too low	Impeller blocked or running sluggishly.
32 – 3		P000221	Electric motor – Short circuit	Electric motor wiring or control fault.
32 – 4		P000222	Electric motor – Short circuit downstream of +Ub	Electric motor wiring or control fault.
32 – 5		P000220	Electric motor – Interruption	Electric motor wiring or control fault.
32 – 7		P000223	Electric motor – Blocking	Impeller blocked or running sluggishly.
33 – 1		P000213	Glow plug – Ignition energy too low	Glow plug energy input is too low.
33 – 3		P000211	Glow plug – Short circuit	Glow plug wiring fault. Risk of overvoltage damage.
33 – 4		P000212	Glow plug – Short circuit downstream of +Ub	Glow plug wiring fault. Risk of overvoltage damage.
33 – 5		P000210	Glow plug – Interruption	Glow plug wiring fault. Risk of overvoltage damage.
35 – 0		P000254	Water pump – Overcurrent cutout	Water circuit may be dirty or restricted.
35 – 2		P0002a1	Water pump – Control / Diagnosis pin interruption
35 – 3	8	P000251	Water pump – Short circuit	Wiring issue or internal short.
35 – 4	8	P000252	Water pump – Short circuit downstream of +Ub or transistor error	Transistor error or internal short.
35 – 5	8	P000250	Water pump – Interruption	Wiring issue or internal short.
35 – 15		P000256	Water pump – Dry running	Coolant is too low.
35 – 16		P000257	Water pump – Overheating	Pump overheated due to ambient heat.
35 – 17		P000255	Water pump – Speed below minimum	Dirty or obstructed water circuit.
35 – 18		P000253	Water pump – Blocking	Kinked or restricted hose.
38 – 15		P000115	Overheating – software threshold exceeded	Water outlet sensor > 125 °C.
38 – 16		P000116	Overheating – hardware threshold exceeded	Water outlet sensor > 130 °C.
42 – 0		P000301	Watchdog reset	Delete errors, the heater remains ready for operation
42 – 11		P000150	Circuit board temperature sensor – defective (voltage too high)
42 – 11		P000151	Circuit board temperature sensor – defective (voltage too low)
42 – 11		P000152	Circuit board temperature sensor– Overtemperature detected
42 – 11		P000300	Overheating detection – Metering pump hardware or cutout circuit defective	Control issue with metering pump.
42 – 11		P000302 P000303 P000304 P000305 P000306	Control box defective	Hardware error in control box.
42 – 11		P000330 P000331 P000332	Control box defective	Internal error.
42 – 11		P000500	Fault memory entry: ErrorState_GSC	Fault state persists while heating or diagnosis request exists.
42 – 11		P000A00	Communication ended by heater	EasyFan didn’t respond to message count.
42 – 19		P000342	Invalid configuration	Too many CAN components.
43 – 0	4	P00010A	Cold air – timeout	Combustion chamber has not cooled sufficiently for a restart.
44 – 2		P000143	Air pressure sensor – implausible signal	Emergency mode: pressure outside allowed range (P < 598 hPa or P > 1106 hPa).
44 – 2		P000315	Implausible air pressure information	Incorrect pressure reading.
45 – 0		P000E01	Runtime limit exceeded	Configured runtime reached.
46 – 0		P00011A	Operating lock-out – too many overheating events	Control box locked due to repeated overheating events (P000114, P000115).
47 – 11		P000258	ADR water pump – Undervoltage / Overvoltage	Voltage outside normal range.
47 – 11		P000259	ADR water pump / vehicle blower – Short circuit	Short in wiring.
47 – 11		P000260	Universal output – Interruption	Disconnected or damaged output.
47 – 11		P000261	Vehicle blower – Short circuit	Blower wiring fault or cover issue.
47 – 11		P000262	Universal output – Short circuit downstream of Ub+ or transistor fault	Output wiring fault or damaged transistor.

Chassis Bridge Fault Codes

Error Code	Description	Cause
171 – 2	Fuel level – Datum value erratic or invalid

Main Thermostat Fault Codes

Error Code	Description	Cause
10 – 2	Ambient Temperature – Datum value erratic or invalid
10 – 15	Ambient Temperature – Datum valid but above normal operational range (least severe)
10 – 17	Ambient Temperature – Datum valid but below normal operational range (least severe)
10 – 19	Ambient Temperature – Received invalid network datum
10 – 20	Ambient Temperature – Network Device Not Responding

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