13
H5
H6
H7
H9
H10
H11
Fault Code
Fault Contents
H4
20-minute break at first or 2-minute break later
Remark
P2
P3
P4
P5
P6
P9
P10
P1
P12
P13
L0
L1
L2
L4
L5
P11
L7
L8
L9
Display P6 protection for 3 times within 30 minutes
Display P2 protection for 3 times within 30 minutes
Display P4 protection for 3 times within 100 minutes
Reduction of indoor units
Display P9 protection for 2 times within 10 minutes
Display P3 protection for 3 times within 60 minutes
Display P13 protection for 2 times within 10 minutes
High-voltage protection
Low-voltage protection
Various frequency over-current protection
Exhaust overheating protection
Pipe overheating protection
Module protection
DC fan fault
Anti-typhoon protection
Refrigeration T2 overheating protection
Fault of the heating fan continuously working for 5 minutes in area A
Current detection error protection
DC compressor module fault
DC bus low voltage protection
DC bus high voltage protection
MCE fault / sync / closed loop
Zero speed protection
Phase sequence error protection
Protection when the speed change of two
successive periods exceeds 15Hz
Protection of speed change (> 15Hz) for
the previous time and the next time
Restore when powering on
Indoor units are lost for more than 3 minutes. It can't be
restored until number of indoor units are restored.
Display H5 after P2 protection for 3 times within 30 minutes
Restore when powering on
Restore when powering on
Restore when powering on
Display H4 after P6 protection for 3 times within 30 minutes
Display H9 after P9 protection for 2 times within 10 minutes
12, 14
,
16and 18kW are effective. 8 and 10kw have no such faults.
Display H6 for 3 times within 100 minutes
6
Trial Run
6.1 Inspection and confirmation before debugging
1)
Check and make sure the refrigerating pipeline and communication line connecting with the indoor and outdoor units are connected with the same
refrigerating system. Otherwise, some running faults occur. .
2)
The power supply voltage is within the rated voltage of ±10%.
3)
Check and make sure the power supply line and the control line are correctly connected.
4)
Before power-on, make sure there is no short circuit.
2
5)
Check if all units have passed 24-hour nitrogen pressure-maintaining (40kgf /cm ) test.
6)
Make sure the debugged system is fully vacuumized, dried and filled with the refrigerant as specified.
6.2 Preparation before debugging
1)
Calculate the refilling volume of refrigerant for each set of units according to the length of on-site liquid pipe.
2)
Prepare the required refrigerant.
3)
Prepare the system plan, system piping diagram and control wiring diagram.
4)
Mark the set address codes on the system plan.
5)
Turn on the power supply switch of the outdoor unit in advance, and make sure it is power-on for more than 12 hours, so that the heater heats the
compressor oil.
6)
Fully open air pipe check valve, liquid pipe check valve and oil balance valve of the outdoor unit. If they are fully opened, the machine may be
damaged.
7)
Check if the power supply phase sequence of the outdoor unit is correct.
8)
Check if all dialing switches of the indoor and outdoor units are set according to the technical requirements of the product.
6.3 Filling of names of connecting systems
Indoor unit type
Room name
Example: 2nd floor, first system, indoor (A)
Remark: -2F-1A
Fig. 6-1 Filling of Names of Connecting Systems
