Troubleshooting - DeWalt DXH70KTFRHC Instruction Manual

Diagnostic Safety Shutdown and Trouble Shooting
MOTOR DOES NOT START AND NO IGNITION
Check power supply (is it plugged in?)
No electrical current Check proper position of the switch (is it on?)
Check fuse/breaker
Wrong setting on Check for setting of thermostat higher than room temp.
thermostat
Defective motor Replace Motor
MOTOR STARTS NO IGNITION OR CUTS OUT
Ensure an adequate level of fuel is in the tank.
Cycle unit a few time to allow fuel to fill the filter and fuel
Not enough fuel at
system.
the burner
Check fuel lines including filter for leaks.
Clean or replace nozzle.
Check igniter connections including transformer
Electronic igniter
Check electrodes for corrosion and carbon build up.
defective
Replace transformer
Flame control box Replace flame control box
defective
Photocell defective Clean or replace photo cell
Check connections
Solenoid defective
Replace solenoid
MOTOR STARTS, HEAT EMITS SMOKE
Make sure Air inlet and outlet are free
Not enough com-
bustion air
Clean burner disc
Drain fuel in tank and replace with clean fuel
Fuel contaminated
or contains water
Clean or replace fuel filter
Air leaks in fuel Check fuel lines and system for possible leaks
circuit
Not enough fuel at Clean or replace fuel nozzle
burner
Too much fuel at Replace nozzle
burner
HEATER DOES NOT STOP
Solenoid defective Replace solenoid
LED DIAGNOSTIC READ OUT TABLE
ERROR DESCRIPTION
CODE
E1 Ignition failed or flame out
E2 Temperature sensor malfunction
E3 High limit switch over heat
E4 Flame control malfunction
E5 Solenoid monitor malfunction
E6 Photo cell fault
E7 Motor Speed fault
7