Baxi RZNK50 Installations- Und Hilfehandbuch Seite 152

ERROR CODES
H4
E1
E3
E8
J2
J3
DESCRIPTION
Low pressure switch
"LPS" failure
4 way valve protection
DC inverter discharge
temperature "Td" too
high shutdown
protection
Coil Center temperature
sensor "Tcm" too high
shutdown protection
The communication
between outdoor unit
and indoor unit failure
The communication
between PCB and INV
module failure
RECOVERY OR
NOT
YES
YES
NO
YES
YES
YES
30
PROBLEM POSSIBLE
REASONS
System pressure lower
than low pressure switch
limit
Low pressure switch failure
Instantaneous power-off
Stop valve closed
In cooling mode indoor unit
EXV close or block
In heating mode outdoor
unit EXV close or block
In heating mode outdoor
unit fan stop
In heating mode outdoor
unit air outlet block
4 way valve block
Outdoor unit PCB failure
System less refrigerant
DC inverter compressor
failure
Compressor air return filtre
block
EXV open degree is samall
or EXV block
Gas pipe stop valve closed
Liquid pipe stop valve
closed
System exhaust sensor
failure
Outdoor unit PCB failure
System over refrigerant
EXV open degree is small
or EXV block
System exhaust sensor
failure
Outdoor unit PCB failure
The communication wire
between indoor and
outdoor units
disconnected, short circuit
or Connected incorrectly
Indoor unit power main
PCB failure
The connection between
driving module and main
PCB failure
The communication part of
outdoor unit control PCB
failure
Frequency driving board
failure
Compressor failure