GMV5 Home DC Inverter Multi VRF Units
265
4. Troubleshooting
4.1 Analysis in Forms
4.1.1 Control
Faults in the ODU’s
main board (such as
memory and
address chip
exceptions)
1 The clock chip on
the main board is
damaged.
2 The memory chip
on the main board
is damaged.
3 The address chip
on the main board
is damaged.
1 Replace the small CPU board
2 Replace the control board.
3 Replace the control board.
Faults in the
constant frequency
compressors current
sensor
1 The constant
frequency
compressor is not
started.
2 The current
detection bord is
faulty.
3 The main boards
detection circuit is
faulty.
1 If the compressor is not started, check if the AC contact is
closed. If not, replace the AC contact.
If the connection is loose, reconnect it;
2 Replace the current detection board.
3 Replace the main board.
Wrong outdoor
capacity code setting
1 The capacity code
is wrong.
2 The dial
component is faulty.
1 Modify the capacity code setting.
2 Replace the main board.
Power phase
sequency protection
1 The three phase
power cable is not
connected correctly.
2 The main boards
detection circuit is
faulty.
1 Check connection of the power cable.
2 Replace the control board.
Wrong emergency
operation dial code
1 The dial setting is
wrong.
2 The dial
component is faulty.
1 Modify the dial setting.
2 Replace the main board.
If C0 is not displayed on the control board of the ODU,
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