Super Hot AAA-3000 series, Installation And Service Manual

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AAA Series Gas Boiler – Installation and Service Manual
32
Troubleshooting Guide Section 8
Problem Possible Cause Solution
•
Incorrect supply power.
•
Check for 115V (AC) across L1 and L2.
•
Faulty transformer.
•
Check for 24V (AC) across terminals C-1 and
HL-15.
BTC series display is
blank.
•
Internal control fault.
•
Replace controller.
• E01 – Controller unable to read from its
EEPROM
• Verify all the settings in the adjust menu are
correct.
•
Shr – Controller is unable to read from one of
the sensors.
•
Check for short circuit at the sensor which is
displayed on the LCD.
• 0Pn – Controller is unable to read from one of
the sensors.
• Check for loose connection/open circuit at the
sensor which is displayed on the LCD.
BTC series displays an
error message.
•
Defective sensor or controller.
•
Perform "Test the Sensors" described in BTC
Series Controller Manual .
• No power. • Check power switches and wiring.
•
No gas supply to boiler.
•
Check gas source and pressure.
• Gas supply pipes are not purged of air. • Purge gas line.
•
No heat demand.
•
Check if thermostat setting is above room
temperature and aquastat setting is above
boiler water temperature.
•
Flow switch or low water cut off.
•
Check pump capacity & flow direction. Check
for correct water levels and air locks.
•
Gas valve failure (closed position).
•
Check gas valve and replace if necessary.
• Thermocouple failure. • Check thermocouple and replace if necessary.
•
Faulty wiring.
•
Check wiring of aquastats, zone valves, and
thermostats for loose or broken wires and
repair.
•
Faulty aquastat, thermostat, or zone valve.
•
Check and replace if necessary.
Boiler will not fire.
•
Pilot not lit.
•
Relight standing pilot. (For electronic ignition,
see "Pilot flame will not light on electronic
ignition".)
•
Poor flow in boiler or circulator failure.
•
Check pump for proper capacity & flow
direction. Replace if necessary.
•
Thermostat, heat anticipator, or aquastat set
too low.
•
Check and adjust.
• Boiler oversized or insufficient radiation. • Check and adjust if necessary.
Boiler goes on and off at
frequent intervals.
•
Wrong type of thermostat or controller.
•
Check and replace if necessary.
•
Gas valve failure (open position).
•
Check gas valve, replace if necessary.
• Faulty wiring. • Check wiring of aquastats, zone valves, and
thermostats for short circuits or incorrect wiring.
Boiler fires continuously.
• Faulty aquastat, zone valve or thermostat. • Check and replace if necessary.
• Boiler is overheated and safety high limit
aquastat fails to cut out.
• Check aquastats and adjust or replace if
necessary.
•
Improper wiring.
•
Check and correct.
•
Foreign matter in heat exchanger.
•
Flush heat exchanger if necessary.
• Poor circulation. • Check pump for correct flow.
Rumbling and moaning
sound in boiler.
•
Air trapped in heating system.
•
Purge air.