Fault code
DISPLAY
Fault description
Required action
E0
EEPROM error
see page 85 / point 1
E2
Communication error between indoor unit and outdoor component
see page 85 / point 2
E3
Communication error on outdoor component main board
see page 86 / point 3
E4
Fault on the outdoor temperature sensor
see page 86 / point 4
E5
Compressor overvoltage protection
see page 86 / point 5
P0
Compressor overload protection (Klixon) tripped
P1
High pressure fault (from RVD 521 and up)
see page 87 / point 6
P2
Low pressure fault (from RVD 521 and up)
see page 88 / point 7
P3
Compressor overcurrent protection tripped
see page 89 / point 8
P4
Compressor overload protection (Klixon)
see page 90 / point 9
P5
Condenser outlet sensor triggered
see page 90 / point 10
P6
IPM power board safety shutdown
see page 91 / point 11
Fault displays shown on the outdoor component
1. Fault code E0: EEPROM error
No
Fit EEPROM properly
Is the EEPROM
fitted properly?
Yes
Replace outdoor
component main board
2. Fault code E2: communication error between indoor
unit and outdoor component
No
Establish the power
supply.
Is there voltage in the
indoor unit?
Yes
Reset the DIP switch
and switch for 5 min
without current.
Are the DIP switches
on the main board set
correctly?. See cover.
Yes
Is the cable connecting
the indoor unit and
outdoor component
properly connected?
No
Connect the cable
properly.
Replace the main board
for the indoor unit or
outdoor component
Yes
Is the cable connecting
the indoor unit and
outdoor component
damaged?
No
Yes
Replace the cable.
No
RVD 521-1051DC outdoor unit fault analysis
35