2002 by ELTRA GmbH Germany – January 2002 – Service Manual OH 900 / ON 900 / ONH 2000
1.11-2
If the detector wheel is rotating regularly, yet the „no water flow“ message appears, or
if the furnace temperature message appears because of a fault on the ON21 board, then it
is still possible to use the analyser, until a spare part is avaible.
1. Turn main switch to position 0
2. Connect pin 2 with pin 7 and pin 8 of the 15-pin connector of ON21
3. Turn the main switch to position 2
Caution
By-passing the safety circuit can cause more damages.
Analysing without sensing the furnace temperature can damage the furnace.
9
15
3 22 1 0
ON 2 1
1
7
82
D1 5 - Sti ft le i s te
1-11-2
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