DC Inverter Multi
VRF Service Manual
169
Fixed-frequency
compressor abnormal
○ ○ ● ○ - - - - -
Fan motor module
protection
○ ○ ● ○
○ - - - -
2
●
Voltage proection of
fan motor drive
● ○ ● ○ ○ - - - -
4
●
Current protection
of fan motor drive
○ ● ○ ○ - - - -
3
Overheat protection
of fan motor module
○ ● ● ○ ○ - - - -
6
○
○
Communicationerror
with fan motor drive
board and main control
○ ● ○ - - - -
5
●
Overheat protection of
fan motor and motor
● ● ● ○ ○ - - - -
-
○ ●
Communication error
with indoor units
and outdoor units
●
● ○ E6 - - - -
Defrosting(normal
operating, not error)
● ○ - - - - -
Oil return operating
(normal operating,
not error)
○ ○ - - - - -
Balancing oil(normal
operating, not error)
○
○ - - - - -
Online testing ● ○ ● ● ○ ○ - - - - -
Outdoor ambient
temperature sensor error
● ● ●
○ F4 - - - -
Error with outdoor coil
inlet temperature sensor
● ● ○ F5 - - - -
Indoor coil middle
temperature sensor error
●
● ○ F6 - - - -
Outdoor coil middle
temperature sensor error
● ○ F7 - - - -
Variable-frequency
exhaust temperature
sensor error
● ○ F9 - - - -
Fixed frequency 1 error
with air-out sensor
● ●
○ F8 - - - -
Fixed frequency 2 error
with air-out sensor
○ ●
○ F8 - - - -
Variable-frequency
top casing temperature
sensor error
● ● ○ ○ F9 - - - -
Fixed frequency 1
error with sensor of
housing head cover
○
● ○ ○ - - - - -
Fixed frequency 2
error with sensor of
housing head cover
●
● ○ ○ - - - - -
High-voltage sensor error
○ ○ Fc - - - -
Low-voltage sensor error
○ ○ ○ Fd - - - -
The quantity of
modules and dial-
up is inconformity
○ ○
● ○ - - - - -
Other modules stop
due to error
● ○
● ○ - - - - -
Notes: 1.
blink;●dark;○bright
The error of DC fan motor board is displayed by the continuous blinking counts of single LED red, the
error of AC fan motor board is displayed by the state of LED red, yellow and green.
Note: The code E5 represents different errors. Therefore, then the wired controller of indoor unit or the lamp displays E5 protection,
please do not immediately cut off the power of complete unit, but checking the records of mainboard, adaptor board and drive
board on outdoor side and observing the detailed display of the error lamp to identify the specic error protection.
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