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2.10 ERROR CODES (CONTINUED)
Error
Error Code Description
Code
130
Flue gas temperature too high Any
133
Safety time exceeded
142
Device failure (Bus)
151
BMU Internal error
152
Parameterization error
153
Unit Locked
160
Fan speed threshold not
reached
162
Air pressure switch
171
Fault input 1
172
Fault input 2
183
Unit in parameterisation mode Any
217
Sensor error
218
Pressure supervision
End user
Diag.
Notes
Code
Check causes of high temperatures before operating Appliance.
Inspect inside of heat exchanger for dirt build up. Check CO
levels at min and max output.
395
Records individual ignition failures and the times they have
occurred. Check gas supply, spark electrode, spark generator,
Ionisation probe, CO
625
A total of 5 unsuccessful ignition attempts has occurred within a
24 hour period. This is the point that the heater went into perme-
nant lockout
Any
Check that the appliance and OZW672 is powered and con-
nected correctly.
330
Ignition output error. Check operation of spark generator. Re-
331
place PCB if no fault with the spark generator found.
332
Gas valve output error. Check operation of gas valve. Replace
333
PCB if no fault with the gas valve found.
Other
Check if polarity of live and neutral has been reversed to the ap-
pliance. Replace PCB if fault repeatedly occurs.
Any
Incorrect / confl icting parameters input (last changed param-
eters need to be investigated).
622
Temperature inside the appliance casing has exceeded 90
Check heat engine door seals and door nuts are correctly
tightened. Pressing the reset for more than 10 seconds will also
produce this lockout.
848
Parameter update fi nished. Press reset to apply changes.
849
Any
Fan does not reach required speed setpoint via PWM control-
Check wiring and operation of fan. Replace fan if necessary
377
Fan speed not reached - Home run stage
378
Fan speed not reached - Standby stage
379
Fan speed not reached - Ignition stage
380
Fan speed not reached - Pre purge stage
381
Fan speed not reached - Post purge stage
Any
Air pressure switch has activated or is open circuit. Check for
fl ue restriction or incorrect fl ue installation. Check air pressure
switch function (operates at 365 Pa). Condense pipework may
be blocked. Check the condensate pipe system is free to fl ow
into the trap and beyond.
Any
User defi ned OZW672 input D1 has been activated.
Any
User defi ned OZW672 input D2 has been activated.
Code will be displayed when a programming stick is used but
should clear when programming is complete. Repeat stick op-
eration if fault code persists
Any
Ionisation current fault or short circuit. Check operation of ioni-
sation probe using parameter 8329 (menu - Diagnostics heat
generation). Ionisation probe may need replacing. Check earth-
ing to the heater
Any
Water pressure inside appliance is low but not yet critical. Ap-
pliance will continue to operate but at 80% of maximum output.
Full output power will not be available until the water pressure is
at or above 0.2 bar.
21
2
setting and fl ue system
2
C.
O
MAXXfl o EVO
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