Gree GRS-CQ6.0Pd/Na-K Service Manual page 132

AIR-TO-WATERHEATPUMP
3.2.6 Open Phase
Monitor
Display
Open Phase
Yes
Replace the main board
Fig. 3.2.6 Flowchart of diagnosis of Open Phase
E5 is displayed on
the wired controller
Check if wire U/V/W is
connected reliably after
the power is cut off for
1 minute.
Yes
If the terminal wiring
of the compressor is
reliable?
Make the terminal
wiring of the
compressor reliable
or replace the
damaged compressor.
Record and report the
actual condition
Main Board 88
Indicating Lamp
LD
No
Connect wires reliably
No
MAINTENANCE
126