AHE test of electrical system heater unit short circuit

Typ ad · téma 83.70 · verze 0100 · 2003-06-16

Platí pro: MODEL 625.1 /2, 655, 656, 657, 658, 659 with CODE (H08) Warmwasser-Zusatzheizung D 5 W MODEL 650, 651, 652, 653, 654 with CODE (H08) Warmwasser-Zusatzheizung D 5 W

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

AD83.70-W-6000-60B

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

Scope of test

Measuring instrument/

Test connection

Operation/Requirement

Specified value

 Possible cause/Remedy

1.0

Heater unit

Cables

12/2 

Heater unit



 12/5

Ignition: OFF

Heater unit: OFF

Disconnect 13-pin plug connection A on control unit (Z13).

Disconnect 12-pin plug connection on heater unit.

Value < 1 Ω:

 Supply cable from relay K2 (on console behind timer) via FF8 (under electrical compartment) and G14/5 (under blower cover) to combustion air blower (short-circuit to ground).

Value > 30 kΩ:

 Combustion air blower (short-circuit)

 Preresistor (short-circuit).

 Interference suppression set (short-circuit)

 Cable on heater unit (short-circuit).