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Manufacturer reserves the right to change specifications or designs without notice.
10.2019
ESI (Ultra) Service Manual
35/68
3.2 Error Codes List
Past error codes can be inquired by
BS3
button, and viewed on Ecoer Smart Service Pro App.
Code
Description
Legend
Page
P1
High pressure protection
36
E1
System locks up when P1 has occurred six times in 3 hours.
Cannot restart *1
P2
Low pressure protection in cooling mode
37
E2
System locks up when P2 has occurred six times within 3 hours.
Cannot restart *1
P3
Compressor discharge temperature (TD) protection
38
E3
System locks up when P3 has occurred six times within 3 hours.
Cannot restart *1
P4
Compressor discharge temp. (TD) sensor is disconnected or damaged
39
P5
Inverter module temperature (TF) protection
40
E5
System locks up when P5 has occurred six times within 3 hours.
Cannot restart *1
P6
Compressor over-current protection
41
E6
System locks up when P6 has occurred six times within 3 hours.
Cannot restart *1
P7
Liquid slugging protection
42-43
E7
System locks up when P7 has occurred three times within 5 hours.
Cannot restart *1
P8
Low compressor voltage protection
44
E8
System locks up when P8 has occurred three times within 60 minutes.
Cannot restart *1
P9
Incorrect compressor line sequence
Cannot restart *1
44
PA
DC fan motor over-load protection
Cannot restart *1
45
F1
Ambient temperature (TA) sensor fault
Backup running*2
46
F2
Compressor suction temperature (TS) sensor fault
Backup running*2
47
F3
Liquid line temperature (TL) sensor fault
Backup running*2
48
F4
Defrost temperature (TH) sensor fault
Backup running*2
49
F5
Compressor discharge temperature (TD) sensor fault
Backup running*2
50
F6
Inverter module temperature (TF) sensor fault
Backup running*2
51
F7
High pressure (HP) sensor fault
Backup running*2
52
F8
Low pressure (LP) sensor fault
Backup running*2
53
E4
Communication fault between main chip and INV drive chip
Cannot restart *1
54
H1
Ambient temperature limit operation in cooling mode
55
H2
Ambient temperature limit operation in heating mode
H3
Abnormal switch alarm for reversing valve
Just show alarm
56
H4
Defrost temperature (TH) sensor is disconnected or damaged
57
H5
EEPROM fault
58
H6
Low voltage alarm
58
HF
Abnormal function control
Alarm
58
C0-CC
Compressor INV module protection
59-60
E0
System locks up when C0~CA has occurred 3 times within 60 minutes.
Cannot restart *1
Remarks:
1.
Disconnect power supply switch for 5 minutes to reset, then turn on power supply for the unit.
2.
Unit goes to backup running under sensors fault varies from 7 to 120 days. Allow up to two sensors backup
running at the same time.