COMPOSITE pt3 - Aux Heater V220.pdf - BenzWorld.org

AD83.70-S-3004A Heater booster (HB) diagnosis operational check 18.8.98
MODEL 638 with ENGINE 611.980
with CODE (MQ3) Engine OM611 DE22 A (60 kW)
with CODE (MQ4) Engine OM611 DE22 LA (75 kW)
with CODE (MQ5) Engine OM611 DE22 LA (90 kW)
MODEL 638 with ENGINE 611.980 with CODE (HZ5) Hot water auxiliary heater 10 kW with timer
a Danger!
Risk of explosion due to fuel vapors, risk of Do not put stationary heater or engine with AS83.70-Z-0002-01A
poisoning from combustion gases and risk heater booster into operation in confined
of injury from burning during or after heater spaces or in the vicinity of tank installations.
operation Allow heater unit to cool down after operation
and wear protective gloves.
Heater booster (ZUH) diagnosis, previous AD83.70-S-2002A
knowledge
ZUH function notes AD83.70-S-2002-04A
Function control
Scope of test Operation/requirement Specified value Possible cause /
remedy
1
Switching heater
Engine: RUNNING AD83.70-S-6002-02A
booster on and off via
climate control
Sufficient fuel in tank
pushbutton control unit Press heater booster switch (A20s6) on Display illuminated in climate control
climate control pushbutton control unit pushbutton control unit and heater booster
switches on
Press heater booster switch (A20s6) on Display goes out and heater booster turns
climate control pushbutton control unit again itself off
Run-on time of the air blower: 120sec.
Not available if no fuel has been drawn
Copyright Daimler AG 11/25/11 G/06/08. This WIS printout will not be recorded by the update service. Page 1