Potterton eurocondense four 125 kw, Installation, Operation And Maintanance Manual, Page: 139 / 148

Fault
code
Fault description Explanations/causes
110 Safety temperature limiter lockout No heat removal, STB interruption, possible short-circuit in the
gas valve
(2)
, internal fuse faulty; allow device to cool down and
carry out reset; if the fault occurs several times inform the in­
staller
(3)
111 Temperature monitor switching off
No heat supply; pump defect, radiator valves closed
1)
119 Fault pressure switch
Check water pressure and top up with water if necessary
1)
121 Flow temperature 1 (Heating circuit 1) monitoring
122 Flow temperature 2 (Heating circuit 2) monitoring
126 DHW charging monitoring
127 Legionnaire's disease germs temperature not
reached
128 Flame failure during operation
132 Gas pressure monitor or air pressure monitor fault Lack of gas, contact GW opened, external temperature moni­
tor
133 No flame during the safety time Reset, if the fault re-occurs several times contact installer,
lack of gas, polarity of mains connection, safety period, check
ignition electrode and ionization current
1) 3)
146 Configuration fault common message
151 Internal fault Check parameters (see adjustment table installer and/or call-
up values), unlock LMS, replace LMS, installer
1) 3)
152 Parameterization fault
160 Fan fault
Fan possibly defective, speed threshold set wrongly
3)
162 Air pressure monitor does not close.
171 Alarm contact H1 or H4 activated
172 Alarm contact H2 (EM1, EM2 or EM3) or H5 activated
178 Temperature monitor heating circuit 1
179 Temperature monitor heating circuit 2
183 The device is in parameter setting mode
217 Sensor fault
218 Pressure monitoring
241 Flow sensor solar sensor fault
242 Return sensor solar sensor fault
243 Swimming pool sensor fault
260 Flow temperature 3 sensor fault
270 Monitoring function
317 Mains frequency outside of valid range
320 DHW charging temp sensor fault
322 Water pressure too high
Check water pressure and drain water if necessary 1)
323 Water pressure too low
Check water pressure and top up with water if necessary
1)
324 BX same sensors
325 BX / extension module same sensors
326 BX / mixer group same sensors
327 Extension module same function
328 Mixer group same function
329 Extension module / mixer group same function
330 Sensor BX1 no function
331 Sensor BX2 no function
11 Troubleshooting
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