andrews CWH 30/201, Руководство по эксплуатации

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End user 20 MAXXfl o EVO
2.10 ERROR CODES (CONTINUED)
Error
Code
Error Code Description Diag.
Code
Notes
110 SLT Lockout Others General overheating issue. Check for pump operation, trapped
air and heat exchanger blockages. Monitor temperatures of
system to establish problem area. Check that the connector
X18 (yellow looped wire) is in place on the control PCB
428
438
817
Maximum Delta T of primary system exceeded. Check that the
fl ow and return sensors are operating correctly. Check pump
operation and check for trapped air in the heat exchanger.
426
437
815
Flow temperature heat up gradient exceeded. Check pump
operation and check for trapped air in the heat exchanger.
Flow through heat exchanger may be restricted.
420
421
819
820
Return temperature greater than fl ow temperature. Check that
the fl ow sensor is operating correctly and the pump direction is
correct.
430
419
422
423
809
810
813
814
Flow temperature exceeded. Check pump operation and
check for trapped air in the heat exchanger. Flow through heat
exchanger may be restricted.
424
425
811
812
Return temperature outside plausible limits. Check return sen-
sor (B7) and replace if necessary .
422
423
809
810
Flow sensor readings are outside plausible limits. Check fl ow
sensor (B2) and replace if necessary
111 Shutdown limit thermostat Any Heat exchanger temperatures have been exceeded. Investi-
gate fl ow rates and controls to determine causes of temporary
fault code.
125 Maximum boiler temperature
exceeded
Any Flow temperatures have been exceeded. Appliance will
continue once temperatures have dropped below maximum
allowed limits.
126 DHW charging temperature not
reached
Any Charging temperature never achieved. Check operation and
heat up times for DHW
127 DHW legionella temperature
not reached
Any Check operation of legionella function and DHW system.
Legionella setpoint has not been achieved within 48 hours of
the legionella function operating. If using a secondary return
system and sensor, do not set the legionella function setpoint
too high, as the heat losses around the hot water pipework
may not permit this setpoint to be achieved
128 Loss of fl ame during operation 394 Flame lost in operation within the fi rst 7 seconds of the start
of the modulation phase. Check the CO 2 is set correctly and
check operation and condition of ionisation electrode.
854 Flame lost in operation after the fi rst 7 seconds of the start
of the modulation phase. Check the CO 2 is set correctly and
check operation and condition of ionisation electrode.
625 Flame lost in operation more than 24 times in a 24 hour pe-
riod. Check the preceding error codes for details on when the
ionisation current was lost. Check the operation of the ionisa-
tion electrode, gas supply, and fl ue system. Check that there is
suffi cient gas available to the heater at all times.