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Model SS4-A/-A2 Multi-Spectrum Digital Electro-Optical Fire Detector
Installation Guide and Operating Manual
MAN0931_V3_1510-001_RevH_06-13
3.1
Model SS4-A/-A2 Detector Faults
The Model SS4-A/-A2 Detector issues a Fault (or Trouble) condition by de-energizing its Fault Relay (J5
connector). The following are Detector Faults:
a. Temperature Fault: The Detector faults if the internal temperature during operation rises above
85°C or falls below -40°C causing both LEDs to blink rapidly. Corrective action for this type of fault
requires factory re-certification.
b. Excessive Input Voltage Fault: The Detector faults if the input voltage is too high (greater than 45
Volts) causing both LEDs to blink rapidly. Corrective action for this type of fault requires factory re-
certification.
c. Low Input Voltage Fault: The Detector faults if the input voltage is too low. The user should check
the voltage between Pins 1 and 4 of the power connector J1 or J2. In this case one LED is on until
the fault is corrected. If the voltage is below 15 Volts the user should check the wiring and the power
supply.
d. No Power Fault: The Detector faults if the input voltage is interrupted or turned off causing the
absence of LED indication. The user should measure the voltage between Pins 1 and 4 of the power
connector J1 or J2. If none or very low voltage is measured, the user should check the wiring and
the power supply.
e. Detector Fault: The Detector faults if its Optical Sensors fail the automatic built-in "through the
lens" test. In this case one LED is on until the fault is corrected. The user should first clean both
inside and outside of the lens thoroughly, then clean the exposed surface of the Detector sensors
and the protective grill mounted on the outside of the housing cover. If the fault has not been
eliminated after re-assembly and powering up for 10 to 15 minutes, factory service may be
necessary.
f. Relay Fault: The Detector faults if one of its Relay circuits fails. In this case one LED is on until the
fault is corrected. The user should return the unit to the factory for service.
g. Self-Checking Fault: The Detector faults if its internal microprocessor finds a failure during self-
checking of the hardware and software. In this case one LED is on until the fault is corrected. This
type of fault may be caused by a number of reasons. The user should verify proper grounding of the
device and the absence of noise on the power cables. If fault persists the user should return the
Detector to the factory for service.
h. Analog "0" current: All the above faults will produce an output current loss (0 + 0.6mA) with the 4-
20 mA module option.
3.2
Cleaning Windowed Enclosures and Detectors
The optical window (lens) of the Model SS4-A/-A2 Detector should be cleaned periodically on a regular
maintenance schedule. For clean area applications, perhaps monthly cleaning schedule will be sufficient.
For extremely contaminated application environments, such as truck filling stations with presence of black
carboneous smoke, daily cleaning schedule may be necessary.
Clean the window of the Detectors each time they are handled, the windows appear contaminated, fails
Built-In-Test, or the Detector fails an end-to-end test with a handheld UV/IR Test Lamp FT2045 or FT-
2145. If necessary, clean the Detector Module Sensors each time the Detector has been disassembled for
wiring or replacement.
Use a blast of an air hose or an oil-free cloth to clean the enclosure window. Oil degrades the performance
of UV Detectors. Occasionally, the use of a solvent, such as alcohol is acceptable. No disassembly of the
Detector is required.
DO NOT USE SILICONE-BASED OR COMMERCIAL WINDOW CLEANING PRODUCTS.
THESE WILL DEGRADE THE MODEL SS4-A/-A2 DETECTOR PERFORMANCE.
TROUBLESHOOTING AND MAINTENANCE
SECTION 3
13
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