Stationary heater (STH) diagnosis, fault memory (B1000, B1800, B1801, B1802, B1803, B1810, B1811, B1820, B1821, B1823, B1824) - AD83.70-P-4002A

MODEL 129 as of 1.6.97 with CODE (228) stationary heater 

	Stationary heater (STH) diagnosis, advanced information		AD83.70-P-2001A
	Connection and use of test equipment		AD00.00-P-1000AZ
	Connect Hand-Held Tester (HHT) and read out fault memory		AD00.00-P-2000-03A
	Notes on diagnosis with Hand-Held Tester (HHT) on heater booster/stationary heater		AD83.70-P-2001-02A
		If a fault is displayed, check fuses, cables, plugs and connectors in accordance with the relevant electric wiring diagram for open-circuit and correct connection.
	Fault memory
Fault code	Possible cause	Note	Remedy
No fault code	No fault recognized	If there is a complaint nevertheless: ↓ Stationary heater (STH) diagnosis, troubleshooting	AD83.70-P-5001A
B 1000	Stationary heater/heater booster control module (A6n1) defective		Replace stationary heater/heater booster control module (A6n1)
B 1800	No flame at the start of heater operation nor after automatic repeat start.		See HHT
B 1801	Flame goes out during heater operation without a new flame after automatic attempt at starting		See HHT
B1801	Flame goes out more than four times during a heater boost cycle		See HHT
B 1802 Overvoltage	Operating voltage has exceeded 15.5 V for more than 6 seconds		AD83.70-P-6001-01A
B 1802 Undervoltage	Operating voltage has been below 10.2 V for more than 20 seconds		AD83.70-P-6001-01A
B 1803	On flame monitor interrogation, the glow pin (A6r2) in its flame monitor function reports a flame prior to the preglow phase.		Replace glow pin (A6r2)
B 1810	Glow pin (A6r2) circuit, short-circuit to positive		AD83.70-P-6001-04A
B 1810	Glow pin (A6r2) circuit, open-circuit or short-circuit to ground		AD83.70-P-6001-04B
B 1811	Malfunction lock-out exists: Thermal fuse in stationary heater/heater booster unit (A6) has blown because the coolant in the heater unit has exceeded the maximum permissible temperature of 125°C or 3 different or the same faults have occurred in sequence		See HHT
B 1820	Stationary heater fuel metering pump (Y23) circuit, short-circuit to ground		AD83.70-P-6001-05A
B 1820	Stationary heater fuel metering pump (Y23) circuit, open-circuit or short-circuit to positive		AD83.70-P-6001-05B
B 1821 Overload,	Combustion air blower (A6m2), overload or short-circuit		AD83.70-P-6001-06A
B 1821	Combustion air blower (A6m2), open-circuit		AD83.70-P-6001-06B
B 1823 Overload,	Circulating pump (A6m1), overload or short-circuit		AD83.70-P-6001-07A
B 1823	Circulating pump (A6m1), open-circuit		AD83.70-P-6001-07B
B 1824	Cable to climate control module, short-circuit to ground		AD83.70-P-6001-08A