Hamworthy MILBORNE381 Series, Design Installation, Commissioning And Operating Instructions

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HAMWORTHY HEATING LTD
36
MILBORNE 500001130/J
Figure 8.6.4 Master control blocking errors (E) - auto reset
Display Nr PC Nr Fault Action
E02 51 Flow temperature sensor T1 - open circuit Check and replace mixed flow sensor T1
E04 53 DHW temperature sensor T3 - open circuit Check and replace DHW sensor T3
E18 67 Flow temperature sensor T1 - short circuit Check and replace mixed flow sensor T1
E20 69 DHW temperature sensor T3 - short circuit Check and replace DHW sensor T3
E23 28 Internal temperature calibration error Check and replace Master board
E24 29 Internal temperature calibration error Check and replace Master board
E25 0 Internal E2PROM error Check and replace Master board
E25 30 Internal temperature calibration error Check and replace Master board
E26 31 Internal temperature calibration error Check and replace Master board
E32 33 No slaves connected Check the position of the Bi-Polar switches.
Check the slave addresses
Check slave electrical connections
Check and replace Master board
Check and replace Slave board
E34 42 Supply frequency error Main frequency is not 50Hz
Figure 8.6.5 Boiler module permanent lock-out errors (A) - manual reset
A01 1 5 failed attempts of starting up Check the gas cock
Check for spark and condition of ht. lead
Check and replace Slave board
A02 2 Too many failed ignition attempts Check and clean or replace the spark elec-
trode.
Check and clean or replace the ht lead.
A04 4 Intervention of limit stat > 90°C Check and correct boiler flow rate
Check and replace limit thermostat
A05 5 Failed gas valve
Faulty connection on gas valve lead Check and replace the gas valve
Check and replace the gas valve cable
A06 6 Internal error Check and replace Slave board
A07 7 Internal error Check and replace Slave board
A08 8 Internal error Check and replace Slave board
A09 9 Supply frequency error Main frequency is not 50Hz
A10 10 Internal error Check and replace Slave board
A11 11 Internal error Reset, check and replace Slave board
A12 12 Internal error Check and replace Slave board
A16 16 Intervention of limit stat > 90°C Check and correct primary flow rate
Check and replace limit thermostat
A19 19 Flue sensor error (fan will run at max. speed) Check and clean heat exchanger
Check and replace flue sensor
A20 20 Flame detected after closing the gas valve Check and replace the gas valve
A22 22 Internal error Check and replace Slave board
A24 24 Fan error - speed not achieved Check the fan and electrical connections.
Replace the fan