Trouble Shooting - Dunkirk DMG-240 Installation, Operation & Maintenance Manual

13.1 Troubleshooting
This boiler is fitted with an electronic regulation and control
unit.
Control system is a microprocessor, Comfort Master©, which
controls and protects the boiler. If a fault is detected anywhere
in the boiler, boiler will lock out and display will show the fault
code as follows:
Red flashing display:
• The symbol
RESET"
• The " symbol
Descriptions of each error code are given in the table below.
To reset an error code, press
If the error code continues to display, search for the cause in
error table and follow instructions given in solution section.
Error Description
Code
Storage unit PSU parameter
E00
not found
The safety parameters are
E01
incorrect
Supply temperature sensor
E02
short circuited
Supply temperature sensor
E03
open circuit
Temperature of heat
E04
exchanger too low.
Heat exchanger
E05
temperature too high
Return temperature sensor
E06
short circuited
Return temperature sensor
E07
open circuit
Return temperature too low
E08
Return temperature too
E09
high

13 - TROUBLE SHOOTING

button for 2 seconds.
Error Code Table
Probable Causes
Bad connection
Bad connection
PSU defective
Bad connection
Sensor fault
Sensor not/poorly connected
Bad connection
Sensor fault
Sensor not/poorly connected
Bad connection
Sensor fault
Sensor not/poorly connected
No circulation
Bad connection
Sensor fault
Sensor not /poorly connected
Bad connection
Sensor fault
Sensor not /poorly connected
Bad connection
Sensor fault
Sensor not/poorly connected
No circulation
troubleshooting charts for further
Checking/Solution
Check the wiring
Check the wiring
Replace PSU
Check the wiring
Check sensors are operating correctly
Check sensor has been correctly fitted
Replace sensor if necessary
Check the wiring
Check sensors are operating correctly
Check sensor has been correctly fitted
Replace sensor if necessary
Check the wiring
Replace sensor if necessary
Purge air in heating system
Check for water circulation (direction, pump, valves)
Check water pressure
Check sensors are operating correctly
Check sensors have been correctly fitted
Check cleanliness of heat exchanger
Check the wiring
Check sensor has been correctly fitted
Check sensors are operating correctly
Check the wiring
Check sensor has been correctly fitted
Check sensors are operating correctly
Check the wiring
Replace sensor if necessary
Purge air from heating system
Check for water circulation (direction, pump, valves)
Check water pressure
Check sensors are operating correctly
Check sensors have been correctly fitted
Check cleanliness of heat exchanger
68
Note corresponding
information (CHART xxx)
(CHART 1)
(CHART 1)
(CHART 1
(CHART 1)
(CHART 1
(CHART 1)
P/N 240011656, Rev. E [07/30/2018]