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6.2. Outdoor Unit Errors
Current errors of the outdoor unit are displayed in the last position of the main menu of the
SCMI-01.4 module. The first line contains the title Error and the second line contains four
two-digit hexadecimal error codes (or the sum of these codes, if multiple errors occur). After
eliminating the displayed errors, this item will cease to be displayed. To view already not
displayed errors, you should press ESC and ENTER keys simultaneously, when the default
screen of the SCMI-01.4 module is displayed. You must press these keys in the given order,
i.e. first press and hold ESC key and then press also the ENTER key. The display shows:
Err -1
AABBCCDD
The number –1 after the title Error identifies the last (previous) error and the second line is
the same as when displaying the current error, i.e. four two-digit hexadecimal error codes (or
the sum of these codes, if multiple errors occur). You can use the ▼/▲ keys to display other
previous errors with numbers from –2 to –8, i.e. it is possible to display up to eight previous
errors. If the number of errors stored in the SCMI-01.4 module memory is lower than 8,
horizontal dashes will be displayed instead of error codes in the empty positions. If the
number of previous errors exceeds 8, all stored error records are shifted and the oldest one
is deleted. In this way, the error list is updated whenever a new error occurs and it cannot be
deleted nor changed by another way. Summary of errors is given in the following tables:
Errors displayed in the AA position
E4
01
Compressor discharge high-temperature protection
02
Lack of refrigerant protection
04
Fan DC motor protection
08
4-way valve protection
10
Overcurrent protection
H3
20
Overload protection
E3
40
Compressor low pressure protection
E1
80
Compressor high pressure protection
Errors displayed in the BB position
01
Indoor unit freezing protection
F3
02
Outdoor ambient temperature sensor malfunction
F4
04
Discharge temperature sensor malfunction
F2
08
Condenser temperature sensor malfunction
10
Condenser inlet tube temperature sensor malfunction
C5
20
Invalid power code (invalid position of the jumper)
40
Drive unit memory chip malfunction
80
Errors displayed in the CC position
01
Protection against starting compressor at a low frequency at a low voltage
02
DC Bus overvoltage protection
04
AC current protection
08
IPM protection
10
PFC protection
20
Start up malfunction
40
Compressor wrong phase order protection
80
Drive unit module sensor malfunction
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