EngA Engineered Air XES225

A XES SC MANUAL
IOM-58 29 of 30 June 14 R5
TROUBLESHOOTING
Warning:
This unit is connected to high voltages. Electrical shock or death could occur if
instructions are not followed. This equipment contains moving parts that can start
unexpectedly. Injury or death could occur if instructions are not followed. All work
should be performed by a qualified technician. Always disconnect and lock out power
before servicing. DO NOT bypass any interlock or safety switches under any
circumstances.
Symptom: Not Enough Heat
POSSIBLE CAUSE
PROBLEM
REMEDIES
Mixing damper operator
not operating properly
Outside air dampers open at low
ambient temperatures.
Adjust mixed air to warmer setting.
Check dampers for proper
operation and adjust if necessary.
Replace damper operator.
Low gas pressure.
Burner is slow to light. Small flame.
Adjust or replace regulator.
Furnace short cycles on
limit switches.
Continual on/off operation of all
burners.
Tighten or replace blower belt.
Check I.D. fan and switch. Clean or
replace filters.
Symptom: No Heat
POSSIBLE CAUSE
PROBLEM
REMEDIES
Blown control module
fuse.
Thermostat calling, ventor motor
running.
Check for cause of blown fuse, then
replace fuse or S825 Module.
Ventor motor air proving
switch not operating.
Ventor motor runs, but ignition
control board is not powered.
Repair or replace air proving
switch.
No gas supply to
manifold.
Electrode sparks, gas solenoid
opens, but no flame.
Check main gas supply.
Symptom: Flame Roll Out - Flame in Manifold Compartment
POSSIBLE CAUSE
PROBLEM
REMEDIES
Blocked flue / chimney.
Flame roll out switch tripping.
Ensure vent / chimney is clear of
obstructions.
Lack of combustion air.
Flame roll out switch tripping.
Increase combustion air.
Leaking gas solenoid
valve.
Gas smell in manifold
compartment. Flame does not go
out immediately when power to
burner turned off.
Replace gas valve.
High gas pressure.
Flame billows out from inlet tube
Reset or replace regulator.
Blocked or damaged
intake screen.
Discoloration of metal inside
burner vestibule.
Repair or clean screen.