Assessments - 3, GPA: 4.7
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Locate the second reset button to the left of the CPU reset button. Hold the left button in, press and release the CPU reset button. There will be 5 beeps (beep/beep – beep/beep – beep). Release the left button. The monitor will now be reset A second way to reset the HGM300 CPU is to turn off power, press and hold the left hand reset button and re-apply power – 5 beeps and release button. RDM800 CPU RESET Shut off power to the RDM800, press and hold the top right adjacent button and re-apply power – 5 beeps and release button. MONITOR WILL NOT COME OUT OF “WARM UP” Try executing “SET HGM CLOCK” from RDM800. This has corrected the problem in a few instances. TO BYPASS THE WARM UP MODE Service mode – Going into and out of the service mode will perform the following functions; 1) – By pass the warm-up cycle 2) – Force a purge cycle 3) – Force a pressure check This may be helpful in analyzing problems with the monitor. HGM300 Self Test Mode The HGM300 refrigerant monitor has a built in self-test mode that will test the following functions: To start the self-test function, locate the left hand white button under the micro controller PCB marked “SW1”. Press and hold for two seconds then release the button. For version 1.0 and version 1.25 firmware HGM300 monitors – .. All lights on the HGM300 go out. .. The Yellow light on the RDM800 will come on after a few moments (Time out error). .. Each light in succession (Green, Yellow and Red) will come on. .. The monitor will toggle each relay (Leak, Spill, Evacuate and Fault) in succession. .. A signal in both channels of the dual 4-20 mA loop will simultaneously be generated (4 mA to 12 mA to 20 mA - Red light flashing). .. The Red light will flash during the 4-20mA test, then all lights will go out and both the HGM300 and RDM800 will return to green on only. For version 1.40 and higher HGM300 monitors – .. Prior to stepping through the functions listed for version 1.0 and 1.25 the HGM300 will complete a solenoid valve check. So for V 1.40 you will hear each solenoid click before the lights sequence. The valve check starts at zone 16 and works down to the purge solenoid. A four zone monitor there is a ten seconds of silence before the valves start to click. .. All lights on the HGM300 go out. .. The Yellow light on the RDM800 will come on after a few moments (Time out error). .. Each light in succession (Green, Yellow and Red) will come on. .. The monitor will toggle each relay (Leak, Spill, Evacuate and Fault) in succession. .. A signal in both channels of the dual 4-20 mA loop will simultaneously be generated (4 mA to 12 mA to 20 mA - Red light flashing). .. The Red light will flash during the 4-20mA test, then all lights will go out, and both the HGM300 and RDM800 will return to “power on” green only. COMMON RDM800 INDICATIONS Initial start up of the HGM300/RDM800 system TIME OUT ERROR – The TIME OUT ERROR indicates that the RDM800 has not gained communication with the HGM300. Check for proper RS-485 connections in both the HGM300 and RDM800. Check for detent at each key on the RDM800. (If a key is stuck on the chassis this could lock out all functions). Locate the stuck key or keys and slip the extension back into the cut out in the chassis. CRC ERROR (Cyclical Redundancy Check) This indicates that the data from the HGM300 was corrupted in some manner. Reset the HGM300 and RDM800 to factory default settings and reset both clocks. SECTION 2 HGM300/RDM800 Refrigerant Gas leak monitor mechanical room placement Text Box: Aux. Horn/Strobe Remote Alarm Text Box: UChiller Text Box: Sample Inlet Pickup Points Text Box: HGM300 Halogen Gas Monitor Text Box: RDM800 Remote Display Module Text Box: Sample Inlet Pickup Point Text Box: Machine Room Interior Text Box: Outside Hallway Text Box: Exhaust Fan SECTION 3 HGM300 Relay Connector Relay#1COMMONNONCRelay#2COMMONNONCRelay#3COMMONNONCRelay#4COMMONNONC Aux. Power Main Power Jumper the ‘Neutral’ of the auxiliary power connector to the ‘Common’ on the relay block. Connect one end of strobe or horn to the ‘NO’ of whichever level of alarm is appropriate for application. The other end of strobe or horn is connected to a 120VAC power source, or to the ‘Line’ of the auxiliary power connector. Text Box: UAlarm Alarm Alarm 1 2 3 Fault Text Box: ULine Neutral Text Box: ULine Neutral Text Box: Horn Text Box: Strobe SECTION 4 NO FLOW CHECK PROCEDURE NO FLOW ZONE Check for air sample tube blockage. NO FLOW PURGE Check for blockage of purge line. Verify that the purge line does not exceed 100’ in length. NO FLOW ZONE AND NO FLOW PURGE Check the water trap. If full of water, drain and re-secure the petcock. If there is no water in the trap, check for a blockage in the exhaust line. Verify that the exhaust line does not exceed 100’ in length. NOTE_ Go to the diagnostic screen and view the “PRESS”, “VAC” and “AMB” values. I “PRESS” equals “VAC”; there is a blockage in the pneumatic system. If “PRESS”, “VAC” and “AMB” are all equal at about 14.0...
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