Hamworthy Purewell VariHeat 70c, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD
33
PUREWELL Vari
Heat c
500001169/T
Error
code
Internal Error-
Code
Potential cause Actions
0 No entry in code
10 Fault outside sensor
20 142 Short Circuit Boiler Flow Sensor Check temp sensor in water flow pipe & replace if nec-
essary
143 Open Circuit Boiler Flow Sensor Check connections to temp sensor in water flow pipe
Check temp sensor in water flow connection & replace
if necessary
28 Fault flue gas sensor
32 Fault flow temperature sensor 2
40 144 Short Circuit Boiler Rtn Sensor Check temp sensor in water rtn pipe & replace if neces-
sary
Open Circuit Boiler Rtn Sensor Check connections to temp sensor in water rtn pipe
Check temp sensor in water rtn connection & replace if
necessary
50 Fault DHW temperature sensor 1
52 Fault DHW temperature sensor 2
61 Fault room unit 1
62 Wrong room unit 1 or wrong radio clock con-
nected
77 Fault air pressure sensor
78 Fault water pressure sensor
81 518 LPB Short Circuit or no power supply Check connections to clip in (switch off and isolate
boiler before working on mains wiring)
82 Address collision on LPB...
91 Data overflow in EEPROM
92 Hardware fault in electronics
95 Invalid time of day
100 2 clock time masters
105 Maintenance message
110/111 Limit thermostat has cut out Allow the boiler to cool and reset thermostat
Investigate cause of overheating (see section 9.3)
113 Flue gas supervision equipment has cut out
117 Water pressure too high
118 Water pressure too low
119 Water pressure switch has cut out
128 Loss of flame during operation Check connections to flame probe
Investigate flame probe condition
Check combustion when boiler is firing
130 Flue gas limit temperature exceeded
132 Safety shutdown Check gas pressure
Check flue & condensate trap for blockages
Check safety switches
133 No flame on completion of safety time Check operation of gas valve
134 Loss of flame during operation
140 Inadmissible LPB segment number/device N°
148 Incompatibility LPB... interface / basic unit
151 552 Relay clip in faulty Check connections to clip in
Check and replace clip in module
(switch off and isolate boiler before working on mains
wiring)
152 Fault in connection with LMU settings
153 LMU has locked out Press reset button
(code appears if reset button is pressed when there
areno faults)
154 Flow Problems Check water flow through the boiler & Check the pumps
160 Fan speed threshold not reached Check obstructions in fan, burner & flue.
Check non-return valve operates
Check heat exchanger for debris
161 Maximum fan speed exceeded
162 Fault air pressure switch (does not close)
164 Fault heating circuit flow switch / pressure
switch
166 Fault air pressure switch (does not open)
180 Chimney sweep function active
181 Controller stop function active
183 LMU... in parameter setting mode
Figure 8.2.9 LMU Error Codes