21
Step
Possible Cause
Check-out procedure
Corrective action
No Heat
5
Riello burner
Check for 120 Volts on the
black wire, contact (COM) on
the burner activation relay.
Yes - Move to next step
No - Back to step # 4 or check for bad
connection
Check if oil primary control is
on reset
Yes - Press reset button
No - Move to the next step
Check for 24 v. coming from
the electronic fan control to
the condensate overflow
switch
Yes - Move to next step
No - Change the electronic fan control
Check for 24 v. coming from
the condensate overflow
switch to the burner
activation relay
Yes - Move to next step
No - Check condensate overflow switch
Check for 24 v. on coil
terminals of the burner
activation relay.
Yes – Move to next step
No - Change the burner activation relay
Check for 120 Volts on the
contact (No) of burner
activation relay
Yes - Move to next step
No - Change the burner activation relay
Check for 120 Volts on
terminal # 1 of the bypass
timer relay. (15sec.)
Yes - Move to next step
No - Change the relay, check for 120v.
on pressure switch terminals.
Check for 120 volts on the
orange wire coming to the
burner (L)
Yes - Failure on the burner
No - Change the electronic control
6
Blower
.
Low speed
Check if the
constant low
speed switch is
ON
Check for 120 Volts at the
''CONT'' terminal on the
electronic fan control
Yes - Move to next step
No - Change the electronic fan control
Check for 120 Volts on both
side of the constant low
speed switch
Yes - Check ''LOW'' speed on the
blower motor
No - Change the switch
.
High speed
(wait for the
seconds delay
''DIP'' switch
adjustments on
the board)
Check for 120 Volts at the ''
Heat'' terminal of the
electronic fan control
Yes - Check ''HEAT'' speed on the
blower motor
No - Change the electronic fan control
