Error Codes; Indoor Unit Error Code Explanation - Baxi RZNK50 Instalación Y Manual De Usuario

8. ERROR CODES

The possible error codes that may appear on the display of the indoor unit or in the wired
control are as follows:
8.1.

INDOOR UNIT ERROR CODE EXPLANATION

ERROR CODES
A1
A2
A5
A6
A8
A9
AA
DESCRIPTION
Indoor ambient
temperature sensor
failure
Temperature sensor
about middle position
of evaporator failure
Indoor water pump
failure
Indoor DC fan failure or
broken
Indoor unit EPROM
module failure
The communication
between indoor unit
and outdoor unit failed
The communication
between indoor unit
and wire controller
failed
RECOVERY OR
NOT
YES
YES
YES
YES
NO
NO
NO
28
PROBLEM
POSSIBLE
REASONS
Indoor PCB is broken
The fuse of indoor
PCB is borken
Temperature sensor is
broken, or exceed test
limit
Indoor PCB is broken
The fuse of indoor
PCB is broken
Temperature sensor is
broken, or exceed test
limit
Water pump no power
Water pump switch
short-circuit or
unconnected
Water pump is broken
Drain pipe block
Indoor PCB is broken
DC fan motor drive
module failure
DC fan failure
Indoor unit PCB is
broken
Error module is
broken
The communication
wire between indoor
unit and outdoor unit
is broken
Indoor unit power
close or PCB is
broken
The communication
wire between indoor
unit and outdoor unit
is broken
Indoor unit power
close or PCB is
broken
Wire controller is
broken