andrews MAXXflo EVO CWH 30/201 Operating Instructions Manual page 22

2.10 ERROR COdES (CONTINuEd)
Error Error Code description
Code
217 Sensor error
317 Mains frequency outside per-
mitted range
322 Water press 3 too high
324 Input BX, same sensors
325 Input BX/extension module,
same sensors
327 Extension module, same
function
335 Sensor input BX21 without
function
336 Sensor input BX22 without
function
353 Cascade flow sensor B10
missing
384 Extraneous light
End user
diag. Notes
Code
765 Ionisation current fault or short circuit. Check operation of ioni-
766 sation probe using parameter 8329 (menu - Diagnostics heat
generation). Ionisation probe may need replacing. Check electri-
cal supply to the heater and burner - pay special attention to the
earth circuit and supply to the heater.
275 The frequency (Hz) of the electrical supply is outside permitted
461 tolerance. Check electrical supply to heater.
85 Water pressure inside the appliance is too high for safe opera-
86 tion. Operation will automatically resume once water pressure
516 is at or below maximum levels. Check that the appliance flow is
565 not restricted or blocked, or the water isolator valves are shut
off.
110 BX sensor duplicated - Two sensor inputs have been defined
twice with the same sensor type (e.g. B3). Review last param-
eters programmed to remove duplication.
Any BX expansion module 1 sensor duplicated - Two sensor inputs
have been defined twice with the same sensor type (e.g. B3).
Review last parameters programmed for the expansion module
to remove duplication.
Any AGU2.5 extension module function duplicated - check param-
eter setup for the AGU2.5 extension module ("Configuration"
menu)
211 A sensor has been detected connected to BX21 of the AGU2.5
expansion module 1, but not defined. Define the sensor using
the parameters or remove the sensor if not required.
213 As above except the undefined sensor is connected to an
215 AGU2.5 expansion module. The AGU2.5 expansion module
should be defined as module 1 - Check the dip switches on the
front of the device are set correctly
Any See Error 335 for guidance
Any Check connections and configuration of common flow tempera-
ture sensor (B10), which is located at the feed into the tank on
the front, left, mid section of the appliance.
252 Ionisation current detected before whilst in standby mode.
393 Check ionisation current ("Diagnostics producer" parameter
8329). If the current present is greater than 0.61 whilst the
burner is in standby, turn off the gas supply to check gas valve
is closing completely. If current is still present, remove ionisation
probe and use a screwdriver to clear the opening through the
burner door before replacing the probe and testing again.
Persistent errors may indicate that the burner is only operational
for very short periods. Try increasing the switching differential by
at least 1 C (parameter 5024) to increase burner run time.
O
Other Ionisation current detected during ignition phase before the gas
valve is opened.
22 MAXXflo EVO