Frequency
Mode
Display operating frequency when the unit is in cooling mode and heating mode.
0-Power off
1-water pump
2-cooling
3-heating
4-force cooling
5-force heating
No.
1
2
3
Content
Remark
Wind speed level
0-Power off (1-7)
4
Total capacity requirements
Capacity before revised(Force cooling displays 5)
6
Temp. set
Cooling/heating temp. set
7
T3
Condenser temperature sensor
8
T4
Outdoor ambient temperature sensor
9
Tp
Comp. Discharge temperature sensor
10
Tin
Inlet water temperature sensor of plate heat exchanger
11
Tout
Outlet water temperature sensor of plate heat exchanger
12
Tb1
Plate heat exchanger anti-freezing temperature sensor 1
13
Tb2
Plate heat exchanger anti-freezing temperature sensor 2
14
T6
Radiator surface temperature(reserved)
15
Unit operation current
Unit operation current
16
Power supply voltage AD value
Power supply voltage AD value
17
Opening of EXV
Model
Version number
Step number *8
18
Err1
19
Err2
20
Err3
21
22
5
Capacity requirements after revised
Capacity after revised (Force cooling displays 5)
Table.10-1 Query orders
3.Auto-lock(unlock) function
If don’t operate the controller in 60s, the keyboard will lock
automatically. Press “ ”and “ ” simultaneously for 3s
to unlock.
4.Factory Reset:
In main interface, long press “ENTER” for 3s, the unit will close and
recovers to factory default mode.
Display panel will display“OFF”
5.Error code and protection code shooting table:
IPM mode protection
Typhoon protection
Outdoor units anti-freezing protection
Flow switch malfunction
High temperature protection in heating mode
Defrosting
Oil return of compressor
Remote control
P4
P5
P6
P8
Pb
C8
CH
dF
d0
d8
Compressor discharge temperature protection
Condenser high temperature protection
Low pressure protection
Outdoor units current protection
E9
CP
CL
H0
E4
E5
E6
EA
Eb
C0
C1
F7
F8
PL
P1
EEPROM malfunction
Anti-idling protection of water pump
Low temperature protection in heating mode
Communication malfunction between the main controlling
chip and IPDU
T3
T4 temperature sensor malfunction
Voltage protection
DC fan motor malfunction
5-minute error for heating mode fan in area A
Two times of E6 protection in 10 minutes(Recover when
powering off)
Tin temperature sensor malfunction
Tout temperature sensor malfunction
Tb1 temperature sensor malfunction
Tb2 temperature sensor malfunction
Radiator high temperature protection
High pressure protection
P2
P3
10.3 Operating characteristics
Set point in cooling
(factory set) = 12°C,Hysteresis = 3°C.
The compressor starts with water temperatures above 12°C.
The compressor shuts down with water temperatures of less
than 9°C.
Set point in heating
(factory set) = 40°C,hysteresis = 4°C.
The compressor starts with water temperatures below 38°C.
The compressor shuts down with water temperatures above 42°C.
In the event of a temporary power failure,when power returns, the
mode set previously will be retained in the memory.
Compressor start up delay
Two functions prevent the compressor from starting up too
frequently.
-Minimum time since last start-up 300 seconds.
(PCB has no such function)
(PCB has no such function)
(Operation panel has no such function)
(Operation panel has no such function)
