Mestek NXIM-2, Руководство по установке

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No Cycling or appliance power or thermostat call for heat since appliance failure has occured.
Line voltage power can cause product damage, severe injury or death. Only a trained experienced
service technician should perform this trouble-shooting.
1. Check the system thermostat to make sure it is calling for heat. (Do not cycle the thermostat on and off at this time.)
2. Observe the LED indicator on the bottom panel of the unit (red or orange LED off indicates no faults); check and
repair system as noted in the chart below.
NOTICE: Air flow proving switch and power venter hose barbs must be free of any dust or debris at all times.
Periodically check these openings and/or if any problems occur.
NOTICE: For Rollout Switch Fault, the rollout switch must be manually reset before unit operation can
resume. If a Red LED-2 Flash is observed, the red button on the rollout switch will have to be depressed
to reset. This switch is located on the top of the burner compartment. The red button should be depressed
until an audible "click" is heard.
HIGH EFFICIENCY GAS-FIRED UNIT HEATER TROUBLESHOOTING WITH LED
INDICATOR ASSISTANCE
LED STATUS INDICATES CHECK/REPAIR
Red LED – Off No Faults Not Applicable.
Red LED – Solid Ignition Lockout Fault 1. Gas supply off or gas supply pressure too low.
2. Flame Sense rod contaminated or loose wire.
3. Gas valve switch is off or wires are not connected.
4. Broken or cracked porcelain on either sensor or ignitor.
Red LED – 1 Flash Flue Limit Fault 1. Obstruction or restriction in combustion air inlet or flue outlet.
2. Unit is over-fired.
3. Control board fault or faulty switch.
4. Power venter is not working properly or producing correct delta pressure.
Red LED – 2 Flash Rollout Switch Fault 1. Obstruction or restriction in combustion air inlet or flue outlet.
2. Unit is over-fired.
3. Control board fault or faulty switch.
4. Power venter is not working properly or producing correct delta pressure.
Red LED – 3 Flash High Limit Switch Fault 1. Gas supply off or gas supply pressure too high.
2. Unit is over-fired.
3. Blocked heat exchanger.
4. Power venter is not working properly.
5. Fan motor(s) or switch(es) failure.
Red LED – 4 Flash Inlet Pressure Switch Fault 1. Obstruction or restriction in combustion air inlet.
2. Tubing connection to switch is cracked or broken.
3. Faulty power venter or switch.
Red LED – 5 Flash Condensate Float Switch Fault 1. Obstruction or restriction in condensate system.
2. Float switch miswired or failure.
3. If applicable, condensate pump miswired or failure.
Red LED – 6 Flash Flue Pressure Switch Fault 1. Obstruction or restriction in combustion air inlet or flue outlet.
2. Tubing is cracked, broken, or blocked by moisture or debris.
3. Blocked heat exchanger.
4. Power venter is not working properly or producing correct delta pressure.
5. Faulty control board, pressure transducer, or switch.
Red LED – 7 Flash User Interlock Fault 1. Open interlock; broken, or miswired connection.
2. Faulty control board.
LED STATUS INDICATES CHECK/REPAIR
Red LED – Solid
Orange LED – 1 Flash
Pressure Transducer Fault 1. Tubing is cracked, broken, or blocked by moisture or debris.
2. Faulty transducer or control board.
3. Power venter not working properly or producing correct delta pressure.
4. Blockage in flue.
Red LED – Solid
Orange LED – 2 Flash
Power Venter Fault 1. Power venter failure.
2. Faulty control board.
Red LED – Solid
Orange LED – 3 Flash
Combustion Blower Fault 1. Combustion blower failure.
2. Faulty control board.
Orange LED – 1 Flash Open OA Sensor Warning 1. Check sensor is properly installed and wired.
2. Sensor failure.
Orange LED – 2 Flash Shorted OA Sensor Warning 1. Check sensor is properly installed and wired.
2. Sensor failure.
Orange LED – 3 Flash Open Space Sensor Warning 1. Check sensor is properly installed and wired.
2. Sensor failure.
Orange LED – 4 Flash Shorted Space Sensor Warning 1. Check sensor is properly installed and wired.
2. Sensor failure.