13500A, Troubleshooting Flowchart
Contents
1. LED on the FSR are Yes gt lit No Low flame signal below 1 2 microvolts Marginal signal 1 2 3 0 Good signal 3 0 to 5 0 FSR power LED only Remove flame rod inspect for soot and moisture Clean and dry Visually inspect for hairline cracks and physical damage To Yes confirm see the flame rod check instructions in the service check section of the manual Inspect flame rod wire lead for good contact at both ends Replace lead if corroded Rail thermostat Yes Normal open No High limit thermostat is wet Significant moisture in thermostat box Logo display ee Oeu ase XES g Dry out thermostats and enclosure inspect 9 j repair enclosure seals 13500A HELLFIRE Models 900 and 900 2005 Switch Heater Troubleshooting Flowchart Aid doc ECN 2681 Page 3 of 6 2793 Fenton Road Phone 613 822 1765 IH HOVEY INDUSTRIES 2005 INC Ottawa Ontario Canada K1T 3T9 Fax 613 822 1556 www hovey ca HELLFIRE Models 900 and 900 2005 Gas Fired Switch Heater Troubleshooting Aid Flowchart STARTS FOLLOWED BY SAFETY SHUTDOWN toggled to Manual note the sequence of LEDs on the FSR 1 the pilot lights 2 the flame does not light 3 the power and alarm light remain lit Mode selector switch is Inadequate gas pressure No Air in gas line No Ignition system faulty no spark No 1 verify supply pressure i2. If a Snap is heard service the gas valve 13500A HELLFIRE Models 900 and 900 2005 Switch Heater Troubleshooting Flowchart Aid doc IH HOVEY INDUSTRIES 2005 INC Page 4 of 6 2793 Fenton Road Ottawa Ontario Canada K1T 3T9 Phone 613 822 1765 Fax 613 822 1556 www hovey ca ECN 2681 HELLFIRE Models 900 and 900 2005 Gas Fired Switch Heater Troubleshooting Aid Flowchart FAN RUNNING NO HEAT Mode selector switch is toggled to Manual Only the Power LED on the FSR is lit Yes anel voltage between 102 and 132 vac and that the frequency is between 54 to 66 hz Electrical power supply is poor Pre or post purge cycle set excessivel long Yes Reprogram logo PLC CONTINUOUS RUNNING Snowing EMS LED Heater on is lit EMS delay off set too long Reduce delay off time with dip switches on EMS board Ok Mode selector on Manual Yes No Toggle switch to Heater off or Remote on position Mode selector toggled to Remote Dispatch requesting heater on Contact dispatch to turn unit off power led is lit Ambient temp below freezing Precip LED is lit Precipitation simulator switch on Turn Simulate precipitation switc
3. HELLFIRE Models 900 and 900 2005 Gas Fired Switch Heater Troubleshooting Aid Flowchart CYCLES EXCESSIVELY Heater functions normally except the cycle time between cycles is short less than 30 seconds Turn down gas manifold pressure Gas manifold pressure exceeds nameplate rating Yes gt No Air intake blocked Yes gt Clear intake No Open trackduct nozzles as per Switch heater Insufficient number of trackduct field Yes gt aa trackduct nozzles modifications manual opened 11237 No 1 remove flame rod 2 inspect for soot and moisture Clean and dry 3 visually inspect for hairline cracks and physical damage To confirm see the flame rod check instructions in the service section of the manual 4 inspect flame rod wire lead for good contact at both ends Replace lead if corroded 5 inspect burner Flame signal below 1 2 Yes microvolts LOW HEAT OUTPUT Point nozzle temperature is less than 140 deg f above ambient Manifold pressure is at or above maximum rating No Raise manifold pressure 13500A HELLFIRE Models 900 and 900 2005 Switch Heater Troubleshooting Flowchart Aid doc Page 1 of 6 2793 Fenton Road Phone 613 822 1765 IH HOVEY INDUSTRIES 2005 INC Ottawa Ontario Canada K1T 3T9 Fax 613 822 1556 www hovey ca Bu
4. h off 13500A HELLFIRE Models 900 and 900 2005 Switch Heater Troubleshooting Flowchart Aid doc IH HOVEY INDUSTRIES 2005 INC Page 5 of 6 2793 Fenton Road Ottawa Ontario Canada K1T 3T9 Phone 613 822 1765 Fax 613 822 1556 www hovey ca Raining and EMS Ambient LED is lit Snow rain temp set too high Reduce set point near freezing on EMS board factory setting 3 deg ECN 2681 HELLFIRE Models 900 and 900 2005 Gas Fired Switch Heater Troubleshooting Aid Flowchart These flowcharts are intended as a guide only Therefore it does not include all possible failures and solutions Personnel carrying out the troubleshooting are to be familiar with the equipment and its normal operation The scenarios and information presented are in a simplified format to aid overall understanding Further details are available in the applicable original operators manual supplied with the heater Hovey recommends that regular inspections be carried out following Switch Heater Inspection Guide Hovey part number 11760 WARNINGS All persons employed in handling propane or natural gas shall be trained in proper handling and operating procedures as required by local authorities having jurisdiction Gas leaks shall be repaired immediately or gas supply valve closed until repairs can be made Perform inspection and operation in accordance with the instructions provided by the specif
5. ic equipment operators manual 13500A HELLFIRE Models 900 and 900 2005 Switch Heater Troubleshooting Flowchart Aid doc ECN 2681 Page 6 of 6 2793 Fenton Road H V Ottawa Ontario Canada K1T 3T9 Phone 613 822 1765 INDUSTRIES 2005 INC Fax 613 822 1556 www hovey ca
6. rner orifices are restricted Service burner Yes See burner maintenance section of the manual ECN 2681 HELLFIRE Models 900 and 900 2005 Gas Fired Switch Heater Troubleshooting Aid Flowchart Mode selector switch toggled to Manual Fan motor does not run Power LED on FSR is lit DOES NOT START No No line power Ensure all line breakers are On and there is voltage at y the service panel Mode selector toggled to Remote Snowing heater equipped with EMS No Power LED on FSR is lit Yes Yes Low temp is set too The alarm light in y The cycling thermostat has failed closed The high limit switch has closed To verify remove the the cycling thermostat from the duct Disconnect the leads and check for continuity when cold below 340 deg f indicated a failed thermostat reset high limit disconnect the 5 amp panel breaker for 10 sec then reset 13500A HELLFIRE Models 900 and 900 2005 Switch Heater Troubleshooting Flowchart Aid doc IH HOVEY INDUSTRIES 2005 INC the control panel is lit Fan motor breaker is switched Off or has tripped No Yes EMS not turned on Turn on EMS Turn on or reset breakers in service panel Low temp LED lit a high Yes s gt board Reduce
7. s between 5 20 psi 2 verify that the pilot gas solenoid is energizing and opening 3 verify that the manual pilot gas shutoff valve is open Yes Purge air from line For a small amount of air a couple of start up attempts may be adequate To confirm remove the lead from but hold it close to the spark plug Reset and start the heater If a spark between the plug and the lead and the burner still does not light then inspect or replace the the plug If there is no spark then inspect or replace the ignition transformer Flame signal Yes Intake severely blocked No opening Air switch open No gt Remove flame rod and clean Visually inspect for physical damage To confirm see the flame rod check instructions in the service check section of the manual Yes gt Clear intake of any snow or debris Once cleared the air switch will close and the trial for ignition will proceed Yes Air switch blocked Calibrate air switch as per the instructions in the service check section of the manual Clear blockage Main gas or safety gas solenoid valve not Yes gt Cycle the heater by turning it off and on Listen for the solenoids to Snap when the FSR energizes them as indicated by the Main LED If no Snap is heard inspect the coil and wire terminations
8. temp cut out set point on EMS board power LED lit Heater LED not lit Rail thermostat is No ambient temp is above 45 deg f The thermal overload switch on the motor has tripped satisfied Disconnect thermostat No at panel and install jumper Snow rain Yes temp set point too low Raise snow rain temp set Reset overload on Point near motor measure the freezing on motor current draw It EMS board must be within 115 of the motor FLA Page 2 of 6 2793 Fenton Road Ottawa Ontario Canada K1T 3T9 Phone 613 822 1765 Fax 613 822 1556 www hovey ca Ambient temp LED Precipitation LED lit Delay LED is blinking Delay on too long Reduce delay on time with dip switches on EMS board ECN 2681 HELLFIRE Models 900 and 900 2005 Gas Fired Switch Heater Troubleshooting Aid Flowchart STOPS AFTER RUNNING NORMALLY Mode selector switch is toggled to Manual The power and alarm The FSR has experienced a system fault and has executed a safety shutdown and lockout The FSR can be reset and the heater immediately restarted by pressing the reset button on the front face of the FSR Refer to the normal sequence of events chart and note the steps as the heater goes through the trial for ignition If the heater stops again refer to the troubleshooting section of the manual
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