65
User manual
Hydrobox module AQMS80X1i
EN
PART 1. OWNER’S MANUAL
Issue
Possible causes
Solution
Poor heating
performance
The outdoor temperature is extremely low Use auxiliary heating device
Cold air is entering through doors and
windows
Make sure that all doors and windows are
closed during use
Low refrigerant due to leak or long-term
use
Check for leaks, re-seal if necessary and
top off refrigerant
NOTE:
If problem persists, contact a local dealer or your nearest customer service center. Provide them with
a detailed description of the unit malfunction as well as your model number.
4.3. Error Codes
Nr Cause
Ordinary
mode
Engineering
mode
Error code
1
Indoor EEPROM error
Yes
Yes
Eh00
2
Indoor and outdoor unit communication malfunction
Yes
Yes
EL01
3
Outdoor EEPROM error
Yes
Yes
Ec51
4
Outdoor condenser pipe sensor error
Yes
Yes
Ec52
5
Outdoor temperature sensor error
Yes
Yes
Ec53
6
Discharge air temperature sensor error
Yes
Yes
Ec54
7
T2b sensor error
Yes
Yes
Ec56
8
Outdoor IGBT sensor error
Yes
Yes
Ec55
9
Water flow failure
Yes
Yes
Eh40
10
TW_in sensor error
Yes
Yes
Eh41
11
TW_out sensor error
Yes
Yes
Eh42
12
TW1 sensor error
Yes
Yes
Eh43
13
TR_Out sensor error
Yes
Yes
Eh44
14
TR_In sensor error
Yes
Yes
Eh45
15
TK sensor error
Yes
Yes
Eh46
16
TWH sensor error
Yes
Yes
Eh47
17
TW1B sensor error
Yes
Yes
Eh48
18
Shedding protection of water temperature sensor in
and out of heat exchanger
Yes
Yes
Eh49
19
Outdoor fan speed malfunction
Yes
Yes
EC07
20
IPM module error
Yes
Yes
PC00