X-1D. Any Call LED (Under Burner Section)
Verify that all heater disconnects are in the off position.
Check interlock terminal blocks corresponding to the Call LEDs which are lit and confirm that the AB positions are not
jumper-wired.
If AB positions are jumper-wired
, remove jumper wire.
If AB positions are NOT jumper-wired
, verify that the 1 and 2 positions have no power supplied.
If 1 and 2 have power supplied
, remove the power source.
X-2. CPC-3 Display Errors
NOTE
If the following listed correction measure does not result in a change to the proper reading, consult a Tjernlund Products technician at 800-255-4208 or
[email protected]
Verify that the wiring from the Transducer to the CPC-3 is correct. Refer to the provided wiring diagrams.
X-3. VFD LED Errors
NOTE
If none of the following listed correction measures result in a change to the proper reading, consult a Tjernlund Products technician at 800-255-4208 or
[email protected]
“Run” LED
Consult a Tjernlund Products technician at 800-255-4208 or [email protected].
“Alarm” LED
Refer to the Fault Code Table to determine the solution to the fault displayed on the red VFD display.
X-4. Errors Regarding Actual Pressure
Disconnect the sensing tube from its location within the ducts.
Create an artificial change in pressure by forcing air in or out of the sensing tube.
If changes in the Actual Pressure DO occur
, slightly adjust the sensing tube depth within its current location and look
for a change or adjust the sensing tubes position within the ducts to an alternate location that meets the following speci-
fications:
The sensing tube should be 2 times the diameter of the vent pipe
behind the heater farthest from the vent termination.
If this is impossible
, the tube must be installed with sensing
tube flush with the interior wall of manifold vent pipe.
DO NOT install sensing tube in an elbow
.
If changes in the Actual Pressure DO NOT occur or if the problem persists
, consult a Tjernlund Products technician
at 800-255-4208 or [email protected]
.
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