41
Manual operator (optional kits)
SPLIT RACK AIR CONDITIONER USER MANUAL
UM.ICUBE2.0-SRAC.SG.0822 August 2022 www.eaton.com
Fault
address Alarm name
Alarm reason
Solution
18
2#Indoor fan failure
The actual speed of fan 2 does not reach
50% of the control speed.
Check the normal operation of the indoor fan, check whether the wiring of
the indoor fan is correct, and reset automatically after troubleshooting.
19
High level switch alarm High float switch action
Check whether the drainage of the water connecting plate of the unit is
normal, and reset automatically after troubleshooting.
20
Electric heating
protection
Action of electric heating protection
switch
Check whether the fan is running normally and reset manually after
troubleshooting.
21
Flooding fault
Flooding switch action
Check whether the drainage of the water connecting plate of the unit is
normal, check whether there is a large amount of condensed water inside
the unit, and reset automatically after troubleshooting.
22
Return air low
temperature warning
The return air temperature is too low.
Reminder effect. Automatically reset after troubleshooting
23
Return air high
temperature warning
The return air temperature is too high.
Reminder effect. Automatically reset after troubleshooting
24
Return air high
humidity warning
The return air humidity is too high.
Reminder effect. Automatically reset after troubleshooting
25
Return air low humidity
warning
Return air humidity level
Reminder effect. Automatically reset after troubleshooting
26
Air supply high
temperature warning
The supply air temperature is too high.
Reminder effect. Automatically reset after troubleshooting
27
Air supply low
temperature warning
The supply air temperature is too low.
Reminder effect. Automatically reset after troubleshooting
28
High voltage alarm
The value of high pressure is too high.
Check whether the condensing fan is running, check whether the condenser
is dirty and clogged, and check whether the undercooling is too high.
Automatically reset after troubleshooting
29
Low voltage alarm
The low pressure value of the compressor
is too low after start up.
Check whether the refrigerant is leaking or not, and check whether the
condenser fan is running normally. Automatically reset after troubleshooting
30
Low superheat alarm
Overheating and low heat
Check whether the electronic expansion valve is working properly.
Automatic reset after 3 minutes
31
Exhaust high
temperature alarm
The exhaust temperature is too high.
Check whether the condensing fan is running, check whether the condenser
is dirty and clogged, and check whether the undercooling is too high.
Automatically reset after troubleshooting
32
High voltage switch
action H2
High voltage switch action of outdoor unit Check whether the condensing fan is running, check whether the condenser
is dirty and clogged, and check whether the undercooling is too high.
Automatically reset after troubleshooting
33
Outer ring temperature
anomaly H8
Missing or short circuit of outdoor ambient
temperature sensor
Check the outdoor ambient temperature sensor and its wiring.
Automatically reset after troubleshooting
34
Compressor out of
phase protection L7
The power supply of outdoor compressor
is out of phase.
Check the power wiring of the outdoor compressor. Automatically reset
after troubleshooting
35
Compressor Phase
current Detection
Fault L6
Outdoor control board detects circuit
faults
Contact the manufacturer for support
36
Compressor module
temperature is too
high L5
The temperature of the outdoor control
panel is too high.
Check whether the condensing fan is normal, check whether the condenser
is dirty and clogged, and reset automatically after troubleshooting.
37
Compressor module
protection L4
Fault of compressor drive module
Contact the manufacturer for support
38
Compressor phase
current effective value
protection L3
Excessive phase current of compressor
Contact the manufacturer for support
39
Compressor Phase
current Peak Protection
L2
Excessive phase current of compressor
Contact the manufacturer for support
40
Compressor start
failure protection L1
The compressor cannot be started.
Contact the manufacturer for support
41
Compressor out of step
protection LO
Abnormal control frequency of
compressor
Contact the manufacturer for support
44
Fault L9 for Phase
current Detection of
DC Fan
Fault of driving module of condensing fan Contact the manufacturer for support
45
DC fan start failure L8 Fault of driving module of condensing fan Contact the manufacturer for support
46
DC fan overcurrent
protection L8
Fault of driving module of condensing fan Contact the manufacturer for support
47
DC fan out of step
protection L8
Fault of driving module of condensing fan Contact the manufacturer for support
48
DC fan out of phase
protection L8
The power supply of outdoor fan is out
of phase.
Check the power wiring of the outdoor fan. Automatically reset after
troubleshooting
49
DC fan module
protection L8
Fault of driving module of condensing fan Contact the manufacturer for support
