Trane K01K12345, Инструкция по установке, эксплуатации и обслуживанию

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32 CLCH-SVX08C-EN
Troubleshooting
:
WARNING
Hazardous Service Procedures!
The maintenance and troubleshooting procedures
recommended in this manual could result in exposure
to electrical, mechanical or other potential safety
hazards. Always refer to the safety warnings provided
throughout this manual concerning these procedures.
Unless specified otherwise, disconnect all electrical
power including remote disconnect and discharge all
energy storing devices such as capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
When necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been trained in handling live
electrical components perform these tasks. Failure to
follow all of the recommended safety warnings
provided, could result in death or serious injury.
WARNING
Hazardous Gases and Flammable Vapors!
Exposure to hazardous gases from fuel substances have
been shown to cause cancer, birth defects or other
reproductive harm. Improper installation, adjustment,
alteration, service or use of this product could cause
flammable mixtures or lead to excessive carbon
monoxide. To avoid hazardous gases and flammable
vapors follow proper installation and set up of this
product and all warnings as provided in this manual.
Failure to follow all instructions could result in death or
serious injury.
Table 11. Troubleshooting gas heat sections
Symptom Probable Cause Recommended Action
Unit not running, no
heat in building.
Loss of power, fuse blown, or
circuit breaker tripped
Check the fuse/breaker panel and reset or replace the device.
Check the fuses if provided, in gas heat control panel and replace as needed.
Manual gas valve closed
Open the gas valve. There may be more than one manual gas valve in the piping system.
Be sure to check all valves.
Thermostat not calling for heat
Repair or replace the thermostat, if defective.
Set thermostat to heating mode.
Safety switch tripped
Verify that one of the following safety switches has tripped:
• High Limit. This switch trips due to a high temperature condition in the gas heat
section. Allow the air handler fan to run and cool heat exchanger. The switch must be
manually reset when the heat exchanger cools.
• Airflow Interlock. This switch trips when there is no or very low airflow over the heat
exchanger. Repair the air handler fan, if necessary. Also, check to see if the unit is
running with a variable-frequency drive. The minimum speed may be set too low.
• High Pressure Gas. This switch trips if there is excessive gas pressure in the gas piping.
Adjust the gas pressure regulator or contact the local gas utility.
• Low Pressure Gas. This switch trips when there is very low gas pressure in the gas
piping. Adjust the gas pressure regulator or contact the local gas utility.
Unit locked out on flame failure;
“Alarm” LED illuminated on flame-
relay panel. Press the Reset button to reset the flame relay and attempt to restart the gas heat
module/section. If the unit continues to trip-out, see the troubleshooting symptom
below.
Combustion airflow switch
contacts may be open
The combustion air motor may be overloaded. Press the Reset button on back side of
the combustion air blower motor.
The combustion air blower motor may be defective. Replace the motor.
The modulating gas valve end switch contacts may be open, indicating that the gas valve
is not fully closed. Look for jammed linkages and repair as necessary.
Replace the modulating gas valve and actuator.
Check airflow switch sensor tubes for clogging or obstruction. Remove debris to clear
tubes.
Check exhaust flue for obstructions. Clear obstructions.
Check inlet air damper for obstructions. Clear obstructions.
Induced draft exhauster fan, if so
equipped, airflow switch contacts
may be open.
Check airflow switch sensor tubes for clogging or obstruction. Remove debris to clear
tubes.
Check exhaust flue for obstructions. Clear obstructions.
Check if air balancing damper is closed. Open damper.
Check 3-phase wiring to unit for correct phasing. Motor may be running backwards.
Unit only runs when
service access door on
piping vestibule is open
Combustion airflow switch
contacts may be open. Check combustion air inlet (into piping vestibule) for obstructions blocking entrance of
combustion air. Remove obstructions or debris.