andrews COMBIflo 100/300, Installation, Operation And Maintenance Manual

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ANDREWS COMBIfl o 70 GB
6.6 FAULT CODE TABLE
Fault
Code
Fault Description Sub
Code
Notes
10 Outside sensor, error Any Outside temperature sensor (B9) is faulty or missing. Check sensor
and wiring for operation (a resistor is pre fi tted which has a value
equivalent to 0
O C. When an outside sensor is installed the pre fi tted
resistor should be removed).
20 Boiler temperature 1, sensor error Other Boiler fl ow sensor (B2) is outside normal limits
439 Boiler fl ow sensor (B2) is short-circuit
440 Boiler fl ow sensor (B2) is open-circuit
22 Water pressure 3 too low Any Water pressure in primary system is low and requires refi lling to a
minimum of 1.0 bar
26 Common fl ow temperature sensor
error Any Check connections or replace faulty sensor located in fl ow pipe work
up stand section (B10)
28 Flue gas temperature, sensor
error 539
543 Flue gas sensor (B8) is short-circuit
540
544 Flue gas sensor (B8) is open-circuit
40 Return temperature 1, sensor
error Other Boiler return sensor (B7) is outside normal limits
441 Boiler return sensor (B7) is short-circuit
442 Boiler return sensor (B7) is open-circuit
50 DHW temperature 1, sensor error Any Check connections or replace faulty DHW tank sensor (B3)
60 Room temperature 1, sensor error Any Check connections or replace faulty room unit (R1)
81 LPB short-circuit or no power
supply Any LPB Short circuit or no bus power supply. Check operation of OCI345
modules and cables
82 LPB address collision Any LPB address duplicated on another Control PCB - Check address of
all PCB parameter 6600
83 BSB short circuit Any No BSB communication or wires shorted - Check operation of room
units and display modules
84 BSB address collision Any Two room units have the same allocation address
98 Extension module 1, error Any AGU2.5 confi guration error - Check parameters
99 Extension module 2, error Any AGU2.5 confi guration error - Check parameters
100 More than one clock time master Any Only one device should be set as the time master, check all LMS14s
(parameter 6640) and any OZW672 connected (in case of connection
to an OZW672, this device should be the master)
102 Clock master without power
reserve Any The control PCB battery backup for the time clock has been depleted
following the restoration of power to the heater. If this message has
not cleared within 10 minutes of power being turned on, turn the
power off , wait 10 seconds and turn the power on again. This mes-
sage does not prevent the operation of the heater in any way.
105 Maintenance message Any Item requiring attention but not preventing heater operation (e.g. 12
Month service due). Check details of message on the heater Front
GUI screen.