ELTRA ONH-2000 User Manual

 2002 by ELTRA GmbH Germany – January 2002 – Service Manual OH 900 / ON 900 / ONH 2000
1.11-1
1.11 1.11 Furnace block temperature too high
The message "Temperature too high" appears on the display when the temperature of the
furnace block is higher than 70°C. The furnace stop s operating.
Voltage
on TP15
<12VDC
?
yes
Tap
water valve
ON
?
yes
Replace furnace
temp. sensor
(behind furnace)
Check the furnace
power settings
Take longer brakes
between analyses
Check the fuses
of ON21
If fuses are OK
Check TP3 of ON21
Replace
solenoid valve
yes
no
yes
no
Voltage
on TP3
13-15VDC
?
lower
Voltage
on TP13
<12VDC
?
yes
OKReplace ON21
Replace water
temp. sensor
Adjust P1
see 2.15
higher
Replace ON21
yes
no
no
no
yes
no
220VAC
on tap water
valve
?
no
Replace ON21
Replace ON21
About
13-15VDC
on TP3
?
1-11
Adjust P2 of ON21
see 2.15
Message
disappears
?
Analyser is OK
adjust threshold
to 70°C,see 2.15
yes
no
M E S S A G E
" T e m p e r a t u r e t o o h i g h "
Furnace
too hot?
(>70°C)
220VAC
on valve
?
Check tap water
solenoid valve,
see 4.3
Check the tap
water connections
see 2.5
operational manual

ELTRA ONH-2000 Specifications

General

Brand	ELTRA
Model	ONH-2000
Category	Measuring Instruments
Language	English