Thermo 90
3 Functional Description
303
G
Vehicle Blower
Setting of Control Temperatures Thermo 90
On the standard wiring harness B6 is not in use.
NOTE
The selected control idle temperature of the heater
should be below the opening temperature of the cooler
thermostat!
Setting of Control Temperatures Thermo 90 S
Connection of signal "motor on"/ "motor off" (terminal D+)
to the control unit (connector X12, contact 7) will enable
different thereshold values.
If the signal terminal D+ is not connected, temperatures
will be those linke for "motor off".
NOTE
The selected control idle temperature of the heater
should be below the opening temperature of the cooler
thermostat!
3.6
Malfunctions
3.6.1 Switch-off upon Failure
In case of a no-flame condition fuel is delivered for a
max. of 180 seconds.
In the event of a flame-out during operation fuel is
delivered for a max. of 90 seconds.
Should an overheat condition exist (after response of the
temperature limiter), no fuel will be delivered.
After switch-off by low voltage protection
for more than 20 seconds there will be no fuel supply.
After removal of the fault there will be an error lock-out.
Reset by switch-off and reactivation of the heater.
In case of overheating, the knob of the temperature limiter
has to be reset after the unit has cooled down.
CAUTION
To avoid damage to the component, do not attempt to
reset the temperature limiter by force while hot.
3.6.2 Diagnosis after Switch-off upon Failure
(Thermo 90)
When operated with switch or triple timer the type of error
lock-out condition is indicated by an operation indicator
light flash code while the heater is in run-down.
After five short signals the following long flash pulses are
counted:
1x
No start (after 2 start attempts)
2x
Flame-out during operation (repeated > 5)
3x
Voltage too low
4x
Premature flame detection
5x
Flame sensor open or short circuit
6x
Temperature sensor open or short circuit
7x
Dosing pump open or short circuit
8x
Fan motor open or short circuit or wrong speed of
fan motor
9x
Glow plug open or short circuit
Table
Rated Temp.
at Sensor
Control
Idle
Reactivation
after
Control Idle
Minus to B6
B6 not used
Plus to B6
80° C
72° C
65° C
90° C
82° C
75° C
75° C
67° C
60° C
Table
Rated Temp.
at Sensor
Control
Idle
Reactivation
after
Control Idle
"Motor on"
"Motor off"
72° C
80° C
82° C
90° C
67° C
75° C
Thermo 90
Thermo 90 S
12 Volt
10.5 V ± 0.5 V
10.5 V – 0.5 V
24 Volt
21 V ± 1 V
21 V – 1 V
Summary of Contents for Thermo 90
Page 9: ...1 Introduction 104 Page free for notes ...
Page 13: ...2 General Description Thermo 90 204 Page free for notes ...
Page 18: ...Thermo 90 3 Functional Description 305 Page free for notes ...
Page 20: ...4 Technical Data Thermo 90 402 Page free for notes ...
Page 26: ...6 Functional Tests Thermo 90 602 Page free for notes ...
Page 41: ...Thermo 90 8 Servicing 809 Page free for notes ...
Page 53: ...10 Packaging Storage and Shipping Thermo 90 1002 Page free for notes ...