Dunkirk DMG-240 Installation, Operation & Maintenance Manual page 71

Shut-
down Description
Code
Su:0 Parameter error
Maximum supply
Su:1
temperature exceeded
Maximum increase of the
Su:2 supply temperature has
been exceeded
Max difference between
Su:7
T. supply/return exceeded
Su:8 No release signal
Line and neutral of power
Su:9 supply are mixed up (if
P43=1)
Su:10 Shutdown input is open
Shutdown input active or
Su:11
frost protection active
Communication error with
Su:13
the SCU PCB
Su:15 Gas pressure too low
Configuration fault or SU
Su:16
(1)
PCB not recognized
Configuration fault
Su:17 or default parameter
(1)
table incorrect
Configuration fault or PSU
Su:18
(1)
PCB not recognized
Configuration fault or
parameters "df-du"
Su:19
(1)
unknown
13 - TROUBLE SHOOTING
Shutdown Code Table
Probable Causes
Parameter error on the PSU
PCB
Non-existent or insufficient
circulation / sensor error
Non-existent or insufficient
water circulation / sensor
error
Non-existent or insufficient
circulation / sensor error
External cause Parameter
error Bad connection
Power supply incorrectly wired
Floating or 2 phase network
External cause Parameter
error Bad connection
External cause
Parameter error
Bad connection
Bad connection with BUS
SCU PCB not installed in boiler
Non-existent or insufficient
gas Pressure.
Incorrect setting of the Gps
gas pressure switch on SCU
PCB
Wrong SU PCB for this boiler
Parameter dF-dU error on the
PSU PCB
Wrong PSU PCB for this boiler
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71
Checking/Solution
Reset df and dU Restore parameters
Check the circulation (direction, pump, valves)
Reasons for the heat demand
Check the circulation (direction, pump,valves)
Check the water pressure
Check sensors are operating correctly
Check sensor has been correctly fitted
Check cleanliness of heat exchanger
Check the circulation (direction, pump,valves)
Check the water pressure
Check the sensors are operating correctly
Check that the sensor has been correctly fitted
Check the cleanliness of the heat exchanger
Correct the external cause
Check the parameters
Check the wiring
Line and neutral mixed up
Set parameter p43 to 0
Correct the external cause
Check the parameters
Check the wiring
Correct the external cause
Check the parameters
Check the wiring
Check the wiring
Carry out automatic detection to find aux. PCB's
Check that the gas valve is fully opened
Check the supply pressure
Check whether the Gps gas pressure control
system has been correctly fitted
Replace the Gps gas pressure control system if need be
Replace the SU PCB
Reset df and dU
Restore parameters
Replace the PSU PCB
Reset df and dU
Restore parameters
P/N 240011656, Rev. E [07/30/2018]