GasSens Gas Detection System Section 2 - A14 Receiver Module
O & M Manual
A14-RK, 8/06 2 - 13
TROUBLESHOOTING
Receiver modules will normally provide trouble free operation over many years of service.
However, should problems arise, a few simple tests can be done to determine if the receiver is
functioning properly.
LED display and green gas indicator do not light when power is applied to the system.
1. Check polarity of the power connection at terminals 1 and 2 of TB1. Terminal 1 must be
positive and terminal 2 must be negative.
2. With a voltmeter, check the power supply at terminals 1 and 2 of TB1. Input power supply
must be 11 to 15 VDC.
Receiver module powers up correctly, but does not respond when test gas is applied to
sensor/transmitter.
1. Disconnect transmitter connections at terminals 11 and 12 of TB1. Check the voltage on the
terminals with a voltmeter. The voltage should be about 12 VDC.
2. Connect a milliamp meter between terminal 11 and 12 of TB1. The current should measure
about 20 mA.
Problems in the receiver module can only be caused by an electronic component failure. In
most cases, the simplest solution is to remove the module and install a replacement.
Troubleshooting the electronic circuit boards is best handled by trained technician familiar with the
circuits. As modules are small and easily shipped, it is best to return defective modules to ATI for
service.
Modules failing during the warranty period will be exchanged by ATI with replacement units.
Contact the ATI service department for assistance.
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