Dungs MPA-4112 Manual

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Heat Injector System

January 2021

Dungs MPA-4112 Flame Management

The Dungs Flame Management, model number MPA-4112, is used with the Heat Injector

System. The information regarding the Display along with and the definition of the State

and Functions are included in the Owner's Manual. The digital file includes the entire MPA

Manual which identifies all the features, parameters, and options.

The following is a listing of the most common Fault Codes. For more information on a

specific Fault Code, go to MPA Manual and search (F8) for the 2 digit Fault Code. The

following are the most common that might appear.

Fault Codes will be displayed here

Common MPA Fault Codes (F__)

04: If the Reset is used 5 times within a 15 minute window the F 04 fault will appear. You

can reset the counter by pressing and holding the Enter button until the display flashes or

wait until time passes.

A2: The safety chain is broken before the heat enable has been removed. This fault

indicates that one of the interlocks in the safety chain "fell out" while the heat was enabled.

This might include a momentary bounce in a pressure switch or a tripped high temp limit.

The fault alarm might appear after the heat enable was removed.

F 13 error code (in Manual as 0x13 if doing a search) If there is a bouncing contact on a

pressure switch in the safety chain, it might also produce the F 13 error code which usually

means the unit is sensing external voltage on terminal 9 or 10. To test, remove any field

wiring and install a jumper between 9 & 10. If the fault continues the internal safety chain

circuit of the MPA is damaged and needs to be replaced.

D1: This indicates the safety chain was broken while the "heat enable" signal was present.

The safety chain is made of the pre-ignition interlocks that need to be in place before

closing the contacts between 9 and 10 on the MPA. These interlocks are typically high

temp limits, the confirmation of airflow, low gas, and high gas pressure switches. The most

likely cause is a bouncing contact on the pressure switch that confirms airflow in the

injection chamber.

A6: There is a problem with the confirmation of the combustion air. The power should

remain on after the heat enable signal has been removed. The fault will be produced if the

pressure switch "falls out" before the heat enable is removed OR if the state of the pressure

switch doesn't change (as in the case of a jumper).

A7: No Flame detected during trial for ignition. Press reset if all safeties are in place and try

again.