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TROUBLESHOOTING
PROBLEM
CORRECTIVE ACTION
No power/lcd display
Check for AC power at the reciver. If not present, check for AC power at TB1. If power exsits at
TB1, check power fuses.
Keypad inactive
Remove receiver and check that keypad ribbon cable is properly secured to PCB header.
Questionable operation
Perform self-test procedure (refer to section 3.2.2.9 & 7.2)
Sensor- related events:
Bad sensor id
Bad sensor
Bad k-value
Fail sensor check
Bad gen schk
Bad id schk
Over range
1. Check Sensor housing for presence of dust or other contaminants which may be blocking
convective gas flow.
2. Check interconnection wiring for loose or missing connections (refer to figures 2-3 through 2-6)
3. Refer to sensor troubleshooting procedure in Section 7.4.2.
4. Remove Sensor housing cover. Voltage between terminals 3 & 4 should measure between
12 and 15 VDC.
5. If no voltage at Sensor, check corresponding terminals at Receiver Sensor Interface terminal
block TB3.
6. Check polarity of voltage at Sensor - Terminal 4 should be positive with respect to terminal 3.
7. Measure voltage across gas generator within 40 seconds after starting the Sensor Check.
It should not exceed 6 VDC. If greater than 6 VDC, replace gas generator.
8. Replace Sensor
Calibration-Related Events:
Fail Zero Cal
Fail Span Cal
1. Check Sensor housing for presence of dust or other contaminants which may be blocking
convective gas flow.
2. Replace Sensor
Moisture in sensor housing
Check for proper orientaion of sensor housing cover( refer to section 2.4)
7.4.2 Sensor Troubleshooting
If a BAD SNS (bad sensor) error message is generated, it may be due to be measured
frequencies that are outside of acceptable limits. The sensor’s output consists of two
frequencies representing sensed gas concentration and ambient temperature values (refer
to section 3.2.1.3). A BAD SNS message will occur when:
• The frequency representing gas concentration falls below 4500 Hz
• The frequency representing ambient temperature falls below 2330 Hz or is greater than
3700Hz.
Either of these conditions indicates that the sensor/transmitter board must be replaced.
If a “SC FAIL” message is generated when a SENSOR CHECK procedure is performed
(refer to section 3.2.2.10), the nature of the problem must be diagnosed.
SENSOR CHECK failure may be due to one of the following:
• Faulty
sensor
• Faulty gas generator or connections (if so equipped)
• Faulty sensor electronics
If the failure occurred in AUTO SENSOR CHECK mode, perform a MANUAL SENSOR
CHECK
to confirm the problem. If the problem occurs during a MANUAL SENSOR CHECK,
perform the following procedure:
• Remove the cover from the sensor connection box housing.
• Measure the sensor’s power supply voltage between terminals 3 and 4 on the terminal
block. Acceptable voltage is between 12 and 15 VDC. Check the polarity of the voltage,
terminal 4 should be positive with respect to terminal 3. If there is a problem with the
supply voltage, check the corresponding terminal at the receiver sensor interface terminal
block TB3 and all interconnection wiring and terminals between sensor and receiver (refer to
Figures 2-3 through 2-6).
• If the sensor’s power supply is correct, perform a calibration procedure (refer to section
3.2.2.11).
receiver.
exists
orientation
Summary of Contents for Capital Controls CHLORALERT 17CA3000 Series
Page 14: ...325 6610 17 14 Figure 2 1 Receiver Outline Dimensions ...
Page 15: ... 15 325 6610 17 Figure 2 2 Sensor Transmitter Outline Dimensions ...
Page 16: ...325 6610 17 16 Figure 2 3 Interconnection Diagram ...
Page 18: ...325 6610 17 18 Figure 2 4 Sensor Wiring ...
Page 44: ...325 6610 17 44 ...
