HAMWORTHY HEATING LTD
32
FLEET V series
500001217/D
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
Check room device
62
Wrong room unit 1 or wrong radio clock con-
nected
Connect compatible room control unit
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...
Check addresses of connected modules
91
Data overflow in EEPROM
92
Hardware fault in electronics
95
Invalid time of day
Set correct time
100
2 clock time masters
105
Maintenance message
P629 to reset : change from 0 to 1
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
Check water pressure
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. Check spark igniter
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 are
no 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
Check parameters
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 8.2.10 LMU Error Codes
