
CSCMA-APH-6-SM1907A
R410A All DC Inverter Mini VRF
Troubleshooting 89
Condition 2: L0 / L4 error appears immediately when the compressor starts up.
L0 / L4
U V W wires between inverter module
and compressor is not connected
properly
1
Yes
Ensure U V W wire is connected
properly
No
Inverter module is failed
2
Yes
Replace the inverter module
No
Compressor has malfunctioned
3
Yes
Replace the compressor
No
Replace the main PCB
Notes:
1. Connect the U V W wires between inverter module and compressor in the right order according to the arrow marked on compressor.
2. Measure the resistance between PU/PW/PV/UN/VN/WN on inverter module. If the resistances are infinite, the U V W terminals are
normal. If the resistances are zero, the U V W terminals have failed.
3. To check for compressor:
The normal resistances of the inverter compressor are 0.7-1.5
Ω
among U V W and infinite between each of U V W and ground. If
any of the resistances differ from these specifications, the compressor has malfunctioned.
If there is another unit nearby that is operating normally, its electric control box can be used to check the compressor. Disconnect
the power wires of the compressor referenced in the error unit and also disconnect the power wires that connect the compressor to
the electric control box in the normal unit and use them to connect the compressor in error unit to the electric control box of the unit
that is operating normally. Ensure that the U, V, W terminals are connected in the right order, and then start the system that is
operating normally. If the compressor in error unit runs normally means the compressor is normal; if the compressor still does not
run normally means the compressor has malfunctioned.
Содержание VRFPLUS CSCMA Series
Страница 1: ...VRF CSCMA SERIES 220V 1Ph 60hz ETL SERVICE MANUAL ...
Страница 3: ...R410AAll DC Inverter Mini VRF CSCMA APH 6 SM1907A ...
Страница 19: ...R410AAll DC Inverter Mini VRF CSCMA APH 6 SM1907A 16 Specifications Performance 5 Wiring Diagrams For 10 5kW ...
Страница 20: ...CSCMA APH 6 SM1907A R410AAll DC Inverter Mini VRF Specifications Performance 17 For 12 14 16kW ...