AIRTRONICS D2 - Page 19

1
2
3
4
2000
1800
1600
1200
1000
800
600
400
200
0
-40 -20 020406080 100 140120 200
Temperature (°C)
Resistance (kOhm)
2400
2200
2000
1800
1600
1400
1200
1000
800
-40 050 100 150
Temperature (°C)
Resistance (kOhm)
200 250 300 350
5
REVISION LEVEL A - 09/09/15
19
SERVICE INFORMATION
Espar part #: 552 00 04
Graduated Cylinder 10ml
FUEL QUANTITY TEST
The fuel quantity should be tested if the heater has difculty starting or
maintaining a ame.
PREPARATION
• Detach the fuel line from the AIRTRONIC.
• Insert the fuel line into a graduated cylinder 10ml.
• Switch the AIRTRONIC on. Once the FMP comes on allow the fuel system
to bleed air out for approximately 60 seconds.
• Switch the AIRTRONIC off and empty the graduated cylinder.
MEASUREMENT
• Switch the AIRTRONIC on.
• The fuel is pumped approx. 60 seconds after switching on.
• Hold the fuel line in the graduated cylinder level with the glow pin while
fuel is being delivered.
• The pump will stop automatically after delivering fuel for 90 seconds
(110 seconds for AIRTRONIC 4).
• Once fuel pump stops, switch off the heater.
EVALUATION
• Read out the quantity of fuel in measuring glass.
• Fuel quantity should be between:
3.5 ml and 4.3 ml. on AIRTRONIC D2
5.0 ml and 6.0 ml. on AIRTRONIC D4
6.8 ml and 7.6 ml. on AIRTRONIC B4
• Replace the fuel metering pump if the fuel quantity is above specied
value.
If measured fuel quantity is insufcient:
– Check the lter in the fuel pump.
– Check that the fuel lines are correctly routed.
– Check that the fuel lines don’t leak.
– Check and tighten hose connections.
– Does fuel withdrawal comply with the data in the technical description.
The fuel quantity is not affected by voltage variances.
Figure 18
PLEASE NOTE!
VALUES FOR OVERHEAT SENSOR
Figure 19
VALUES FOR FLAME SENSOR
Figure 20
Temperature °C (F°) Resistance kΩ min. max.
-40 (-40) 1597.0 1913.0
-20 (-4) 458.80 533.40
0 (32) 154.70 175.50
20 (68) 59.30 65.84
40 (104) 25.02 28.04
60 (140) 11.56 13.16
80 (176) 5.782 6.678
100 (212) 3.095 3.623
120 (248) 1.757 2.081
140 (284) 1.050 1.256
160 (320) 0.6654 0.792
180 (356) 0.4253 0.5187
200 (392) 0.2857 0.3513
Temperature °C (F°) Resistance Ω min. max.
-40 842.7 825.9 859.6
-20 921.6 803.2 940.0
0 1000.0 980.0 1020.0
20 1077.9 1056.4 1099.5
40 1155.4 1132.3 1178.5
60 1232.4 1207.8 1257.1
80 1308.9 1282.8 1335.1
100 1385.1 1357.4 1412.8
120 1460.7 1431.5 1489.9
140 1535.8 1505.1 1566.6
160 1610.5 1578.3 1642.8