Dungs MPA-4112 - User Manual

Heat Injector System
January 2021
www.HeatInjector.com/support
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.
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.
Fault Codes will be displayed here

Summary

Dungs MPA-4112 Flame Management System

Common MPA Fault Codes Overview

Introduces and lists common fault codes for the Dungs MPA-4112 Flame Management system.

Fault Code F04

Explains F04 fault occurs after 5 resets in 15 mins; can be reset by holding Enter.

Fault Code A2

Indicates a broken safety chain before heat enable, possibly due to pressure switch bounce or high temp limit.

Fault Code F13

Caused by bouncing pressure switch or external voltage; suggests testing by jumpering terminals 9 & 10.

Fault Code D1

Safety chain broken with heat enable present, often due to airflow pressure switch bounce.

Fault Code A6

Indicates combustion air confirmation issue, likely pressure switch failure before heat enable.

Fault Code A7

Signals no flame detected during ignition trial; suggests resetting if safeties are in place.

Fault Code A8

Flame extinguishes during operation due to air in line, low fire, or poor flame rod signal.

Fault Code A9

Flame failure post-ignition stabilization, possibly due to air in line or low fire setting.

Fault Code Fb6

POC error on valve #2, often due to loose set screw affecting switch indication.

Accessing Stored Error Codes

Explains how to view the last 10 error codes using MPA display buttons.

Flame Rod Maintenance Procedures

Details how to check flame rod signal strength and clean/replace it for optimal performance.

Dungs MPA-4112 Specifications

General

Brand	Dungs
Model	MPA-4112
Category	Industrial Equipment
Language	English