Nortek GFU18USV4DH - Installation of Controllers; Testing; Trial Operation and Testing

DC Inverter U-match Series Floor Ceiling Type Unit
25
Power lines should go along the right side plate. Communication lines between
indoor and outdoor units also should go along the right side plate and kept away
from power lines.
5 Installation of Controllers
Refer to the Installation Manual of the controller for more details.
6 Testing
6.1 Trial Operation and Testing
(1). The meaning of error codes as shown below:
Table 6.1
Number
Error code
Error
Remarks
1
E1
Compressor high pressure protection
2
E2
Indoor anti-freeze protection
3 E3
Compressor low pressure protection, refrigerant lack
protection and refrigerant colleting mode
4
E4
Compressor high discharge temperature protection
5
E6
Communication error
6
E8
Indoor fan motor error
7
E9
Full water protection
8
F0
Indoor ambient temperature sensor error
9
F1
Evaporator temperature sensor error
10
F2
Condenser temperature sensor error
11
F3
Outdoor ambient temperature sensor error
12
F4
Discharge temperature sensor error
13
F5
Temperature sensor error of wired controller
14
C5
Capacity code error
15
EE
Outdoor memory chip error
16
PF
Electric box sensor error
17
H3
Compressor overload protection
18
H4
Overloading
19
H5
IPM protection
20
H6
DC fan motor error
21
H7
Drive desynchronizing protection