WT.050.130.000.UA.IM.1108
ACUTEC
™
35 SYSTEM
40
4.8 Troubleshooting
Trouble
Remedy
Receiver LEDs and indicators do
not light when power is applied
to the system.
Check the fuse. If the fuse is blown, replace the fuse. If
1.
not, go to step 2.
Check wiring from the Power Supply Module to the
2.
Receiver Module (see Dwgs. 50.130.130.001 and
50.130.130.002). Be sure polarity is correct. If wiring is
correct, go to step 3.
With a voltmeter, check the power supply at the “+12”
3.
terminal (positive) and “C” terminal (negative) on the Re-
ceiver. If the reading is between 13.6 to 13.9 Vdc, replace
the Receiver. If the voltage is above 13.9 V, go to step 5. If
the voltage is below 13.6 V, go to step 4.
Measure the ac input voltage at the Power Supply Mod-
4.
ule. If the voltage is not within the rated range (see
Section 1.1 - Technical Data), check ac supply. If the volt-
age is within the rated range, replace the Power Supply
Module.
If the voltage measured in step 3 is above 13.9 V, connect
5.
another Receiver Module or a resistive load of approxi-
mately 100 ohm and 2 watts to the Power Supply output
terminals. If the voltage drops to within 13.6 - 13.9 V,
replace the Receiver. If not, replace the Power Supply
Module.
Receiver module powers up
correctly, but does not respond
when test gas is applied to sen-
sor/transmitter.
Disconnect the Transmitter connections at the two “TR”
1.
terminals of the Receiver. Check the voltage on the ter-
minals with a voltmeter. The voltage should be approxi-
mately 12 Vdc. If this voltage is not present, replace the
Receiver Module. If it is measured, go to step 2.
Connect a milliamp meter between the two “TR” terminals
2.
of the Receiver. The current should be 15 to 25 mA. If this
current is not measured, replace the Receiver Module. If
it is measured, refer to the Sensor/Transmitter paragraphs
in this Section.