MHS Boilers STRATA 3 220, Instructions For Installation, Servicing & Operation

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STRATA3
37
9.2 error correction list
The error correction list contains possible causes as well as information about the elimination of
the fault.
Line Number Cause of the Fault Remedy
1 DIP switch not correctly set Adjust according to the instructions
2 Room unit KKM2 not connected correctly Check wiring
3 Sensor not connected correctly or defective Measure resistance, replace where appropriate
4 Defective room unit/KKM2 Replace room unit, where appropriate
5 Short circuit in the cable to the flow Check cable, replace where appropriate
temperature sensor S1
6 Pump does not turn, possibly seized Check connections:
attempt to turn the shaft with a screwdriver
7 Water loss Search for leakage and correct, refill system
9 Fan not connected correctly Check connections
10 Fan is dirty Clean fan (see section 8.0)
11 Fan is defective Replace fan
12 Gas shut off valve closed Open gas shut off valve
13 Gas pressure too low Check gas supply cross section and gas meter
14 Defective fuse (to the left on the boiler control panel) Replace fuse
15 Minimum or maximum adjustment at the Regulate again (section 6)
gas multi-purpose valve not correct
16 Gas multi-purpose valve is not connected correctly Check connections
17 Ignition cable not connected correctly Check cables for over heating,
and security or moisture
18 Defective transformer Replace transformer
19 Siphon is dirty/blocked Flush siphon, and check condense
waste system is clear
21 Contact resistance at the STB water or Measure resistance over STB,
at the STB exhaust gas too high if resistance is over 1
Ω
, replace STB.*
22 Resistance in the air supply/exhaust gas system too high Check length and cross section, possibly clean
23 Flue gas re-recirculation Check exhaust connections
25 Heat exchanger is dirty Clean
26 STB water is defective Replace STB *
27 Incorrect or no gas injector, not mounted correctly Check gas injector
28 Defective STB exhaust gas Replace STB *
29 Defective control panel Replace boiler control panel
30 Incorrect position of the ignition electrode Carefully bend, the gap distance to the burner
must be 4 to 5mm
31 Damp Wipe up water, possibly dry with an electric hairdryer
32 Mains connection not correct Check and rectify
33 Wiring interrupted Check and rectify
34 ‘Reset’ button pressed too long, possibly jammed Press ’reset’ button briefly, check whether it sticks;
if the fault does not disappear,
then replace boiler control panel
35 Earth wire not attached correctly Press ‘reset’ button, check earth connection.
If the fault does not disappear,
then replace boiler control panel
39 Hot water primary pump does not work correctly Check pumps, replace where appropriate
44 Fuse 24V defective Replace fuse
45 Maintenance interval expired Press service button for 10 seconds and
carry out maintenance/inspection.
*STB = Limit Thermostat