64
Procedure
E5
ODU power supply is abnormal or a
phase is missing
1
Yes
Provide normal power supply
No
Wires between outdoor main PCB, AC
filter boards and electric control box
power supply terminals are loose
Yes
Ensure the wires are connected properly
No
High voltage circuit error has occurred,
such as the compressor has
malfunctioned
2
, the fan motor has
short-circuited
3
, or the inverter module
has short-circuited
4
Yes
Replace or repair the relevant parts
No
Replace outdoor main PCB
Notes:
1. The normal voltage between L1 and L2, L1 and L3, and L2 and L3 is 198-242V.
2. The normal resistances of the inverter compressor are 0.05-0.15Ω 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.
3. The normal resistances of the fan motor coil among U V W are less than 10Ω. If a measured resistance is 0Ω, the fan motor has short-circuited.
4. Set a multi-meter to buzzer mode and test any two terminals of P N U V W of the inverter module. If the buzzer sounds, the inverter module has
short-circuited.
Figure 6-2.1: Inverter module terminals
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