Section 14 - Troubleshooting
QUESTIONS?... Contact Customer Service at 1-888-370-6531 M-F 8:00 am- 4:15 pm CST
44
Remove two yellow wires
WARNING: DO NOT OPERATE YOUR HEATER IF THE OIL PRIMARY
SAFETY CIRCUIT IS NOT WORKING!
!
I
nitia
l
Diagnosis
:
When an operating problem occurs, a determination must be made whether or not the fuel
pump is pumping a sufficient amount of oil that contains no air or water.
Ta
k
e
these
steps
:
t
Adjust the burner air regulator to -0- PSI.
t
Turn pre-heater rocker switch off (red light off ).
t
Shut off oil supply line valve to the burner.
t
Remove the fuel supply line from the supply tank.
t
When using a by-pass regulator attach a flexible piece of tubing at least 3 feet long to the
outlet on the return side of the oil by-pass regulator.
t
When using a metering pump disconnect the fuel supply line from the burner.
t
Insert the tubing into the bottom of a large jar.
t
Jump the cad cell circuit and start the fuel pump (see below).
t
Attempt to fill the jar above the open end of the tubing.
t
If the pump will not pump fuel, attempt to prime the pump (Section 10). If the pump
won’t prime refer to Flow Chart Item B.
I
f
no
air
or
water
is
present
the
fl
ow
must
be
determined
:
t
When using a by-pass regulator pump fuel for 1 minute into a graduated container, if the
flow rate is less the 250 MILS/Minute (8-1/2 Ounces), refer to Section 14 Troubleshooting
Chart Item B.
If the flow rate is more than 250 MILS/minute (8-1/2 Ounces), refer to Troubleshooting
Chart Item C.
W
hen
using
the
optiona
l
metering
pump
:
Pump fuel for 1 minute into a graduated container. The flow rate will vary by model.
MX-150 . . . . . . . . . . . . . . . . . . 66 ML/MIN
MX-200 & MXD-200 . . . . . . 87 ML/MIN
MX-250 & MXB-250 . . . . . . 109 ML/MIN
MX-300 & MXD-300 . . . . . . 139 ML/MIN
If flow rate using a metering pump is more than +/- 10% contact Lanair Service at
888-370-6531.
After repairs are made, remove the cad cell
jumper wire, and reconnect the cad cell wires
to the oil primary.
B
y
-
passing
the
oi
l
primary
safety
circuit
:
Some trouble-shooting test may require the cad
cell safety circuit in the oil primary control to be
bypassed, to do this:
t3FNPWFUIFZFMMPXXJSFTGSPNUIF''
terminals on the oil primary control.
