ad8370d4000a

Auxiliary heater (AHE) diagnosis fault memory

Typ ad · téma 83.70 · verze 0101 · 2003-06-13

Platí pro: MODEL 901.###, 902.###, 903.###, 904.### ## up to 753730 up to 31.10.97 with CODE (H11) Warm air auxiliary heater Heater unit designation B1L-C, Heater unit designation D1L-C

Není k dispozici v jazyce „cs“; zobrazeno v jazyce Angličtina.

Zařazení

Funkční skupina 3 Nástavba › 83 Klimatizace › 83.70 Nezávislé topení, přídavné topení, přihřívač — Řada 901 · Řada 902 · Řada 903 · Řada 904

AD83.70-D-4000A

Auxiliary heater (AHE) diagnosis fault memory

27.6.97

MODEL 901.###, 902.###, 903.###, 904.### ## up to 753730 up to 31.10.97 with CODE (H11) Warm air auxiliary heater
Heater unit designation B1L-C,
Heater unit designation D1L-C

Danger!

Risk of explosion due to fuel vapors, risk of poisoning from inhaling combustion gases and risk of injury from burns during or after heater operation.

Do not put stationary heater/auxiliary heater or engine with heater booster into operation in confined spaces or while refuelling. Allow heater unit to cool down after operation and wear safety gloves.

AS83.70-Z-0002-01A

Auxiliary heater (AHE) diagnosis, previous knowledge

AD83.70-D-2000A

I

Battery voltage > 9.5 Volts

II

Auxiliary heater complete (all connectors connected)

III

Connect Hand-Held Tester (HHT)

AD00.00-D-2000-03A

IV

Ignition and auxiliary heater switched on

Cables, plugs and connectors are also taken into account on the tests with the HHT and, if a fault is displayed, may have to be checked again separately in accordance with the relevant electric wiring diagram for open-circuit, good contact and correct connection.

Fault code

Fault text (HHT)

Possible cause/Remedy

Overvoltage shut-off

Regulating voltage

Undervoltage shut-off

Check fuse F9. Check battery and regulating voltage

Test electric cables (voltage drop)

Overheating or metering pump –//–

Check inlet and outlet of hot air pipe for

obstruction and eliminate obstruction if necessary

Check electric cables and connections on metering pump.

Check overheating switch

Overheating of flame sensor

Check flame sensor and replace if necessary

Glow plug –//–

Check glow plug and replace if necessary

Check electric cables and connections

Diagnosis output

Check electric cable

Blower motor does not turn

Check part-load relay and replace printed-circuit board if necessary. Check connections to blower motor.

Check motor and replace blower if necessary

Part-load relay

Check electric cables and connections. Check part-load relay and replace printed-circuit board if necessary.

Metering pump

Check metering pump and replace if necessary.

Check electric cables and connections

Too many attempts at starting

Control module lock-out due to failure to start 5 times in succession (refer to code )

Does not start

Check fuel supply and glow plug

Flame goes out during operation

Check fuel supply, quantity of fuel and blower speed.

If combustion is in order, check flame sensor.

Temperature sensor

–//–

Check temperature sensor on printed-circuit board and replace printed-circuit board if necessary.

Heater timer

–//–

Check connections on heater timer and replace heater timer if necessary.

Flame sensor

–//–

Check connector to flame sensor. Check flame sensor and replace if necessary

External interference voltages

Eliminate interference voltages

Control module defective

Replace control module

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