IOM SYSVRF2 AHU BOX0620 20220209 134828067 20220209 140641571

25
6 ERROR CODE AND QUERY
Error Code
Priority
1
2
3
5
6
7
8
9
10
11
12
Definition
Rcfrigerant leak error
Emergency shut down
No address is set
IDU address code repeated F7+repeated address,
displayed alternately every 1s
Mode conflict error
Communication error between IDU and ODU
T1 sensor error
T2 sensor error
T2B sensor error
T2A sensor error
IDU fan error
EEPROM error
4
A1
A0
FE (only displayed on the display board)
F7+repeated address
E0
E1
E2
E3
E4
E5
E6 (reserved)
E7
13
TA sensor error
E8 (the error is not reported when return air temperature
control is applied)
Communication error with the wired controler,
or no address is setted
14 E9 (only for wired controler)
15
Error of electronic expansion valve coils
Eb (restore after power on again)
ODU error
17 Ed
Water level alarm error
EE
18
Low temperature alarm
19
H2
High temperature alarm
H3
20
Displayed content
21
The number of detected AHU control boxes and the
number of dialing units are inconsistent,
or Master-slave communication is not available
H6
22
Capacity DIP switch of the AHU control box is
inconsistent with model
H8 (restore after power on again)
23
(ENC2,ENC3,ENC4)incorrect DIP switch for 0-10V
fan signal.The DIP switch value ensures
ENC2
< ENC3< ENC4.
H9 (restore after power on again)
24 P1 (reserved)
25
MS error mode
F8
26
MS self-check error
U4 (restore after power on again)
27 Slave unit error Hb
Pressure sensor error