TABLE 6-2 Non-FDS (Non-Fault Detection System) Troubleshooting
Symptom Transmitter Models Procedure
Yes No
1. Increase the LCD contrast to maximum (Section 2). Is the LCD blank? CALL DONE
Set the contrast to the desired level if this corrects the problem.
1. Is a 24 VAC power source properly connected to power terminal block with terminal screws secure and no
shorts between wires (refer to the appropriate Wiring Guide for terminal connections)?
3. 2.
“Live” wiring to transmitter may damage the transmitter and void warranty
2. Make sure the 24 VAC power source is not energized. Properly connect the 24 VAC power source to the
power terminal block. Energize the 24 VAC power source. Is the LCD blank?
3. DONE
3. Is the power switch in the "ON" position? 5. 4.
4. Move the power switch to the "ON" position. Is the LCD blank? 5. DONE
5. Measure the voltage across the power terminal block screws with a VOM configured to measure VAC. Is
the voltage between 22.8 to 26.4 VAC?
7. 6.
6. Move the power switch to the "OFF" position. Correct input power problem so that the power supplied unde
load is between 22.8 and 26.4 VAC. Move the power switch to the "ON" position. Is the LCD blank?
7. DONE
7. Move the power switch to the "OFF" position. Remove and inspect the power fuse. Is the fuse blown? 8. CALL
Check the fuse with a VOM set to ohms to verify the fuse is good (shorted) or blown (open).
8. Remove all signal wires and probes from transmitter. Replace the glass power fuse with a fast-acting fuse
with the power rating indicated on printed circuit board. Move the power switch to the "ON" position. Is the
LCD blank?
CALL 9.
9. Move the power switch to the "OFF" position. Connect all sensor probes. Move the power switch to the
"ON" position. Is the LCD blank?
CALL 10.
10
Move the power switch to the "OFF" position. Connect all signal wires. Move the power switch to the "ON"
position. Is the LCD blank?
11. DONE
There was a problem that caused the fuse to blow that is no longer present.
11
There is a problem with the signal wiring or the host control system. Move the power switch to the "OFF"
position. Disconnect the signal wiring, check for shorts in the signal wiring and/or other problems with the
host control system. Is there a control wiring problem or other problem with the host control system?
12.
CALL
12
Correct the problem with the signal wiring or the host control system. Replace the blown power fuse.
Connect all signal wires to the transmitter. Move the power switch to the "ON" position. Is the LCD blank?
CALL DONE
1. Is a 24 VAC power source properly connected to power terminal block with terminal screws secure and no
shorts between wires (refer to the appropriate Wiring Guide for terminal connections)?
3. 2.
“Live” wiring to transmitter may damage the transmitter and void warranty
These models have solid state fuses. Allow at least one minute between power cycles to allow the solid
state fuses to reset in the event they were in a fault condition.
2. Make sure the 24 VAC power source is not energized. Properly connect the 24 VAC power source to the
power terminal block. Energize the 24 VAC power source. Is the LCD blank?
3. DONE
3. Is the power switch in the "ON" position? 5. 4.
4. Move the power switch to the "ON" position. Is the LCD blank? 5. DONE
5. Measure the voltage across the power terminal block screws with a VOM configured to measure VAC. Is
the voltage between 22.8 to 26.4 VAC?
7. 6.
6. Move the power switch to the "OFF" position. Correct input power problem so that the power supplied unde
load is between 22.8 and 26.4 VAC. Move the power switch to the "ON" position. Is the LCD blank?
7. DONE
BASIC OPERATION
A4 Transmitter Model
GTx116e, GTx208e, GTx108e,
GTx204e
The Activity LED flash rate is one second on and
one second off and the display is blank.
All Transmitter Models
A4 Transmitter Models
GTx116, GTx108, HTx104
and HTx202 where x = {all
output types}
The Activity LED is not illuminated and the LCD is
blank
Troubleshooting_Table6-2_r1o TABLE 6-2 │ Page 1 of 17
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