Gree GWH18AC-D3DNA1B Service Manual page 46

DIAGNOSTIC CHARTS (CONT.)
Visually confirm that fan Visually confirm that fan
blades and outdoor coil blades and outdoor coil
are not blocked. are not blocked.
Yes Yes
Trace connections from Trace connections from
OD board. Connections OD board. Connections
ok? ok?
Yes Yes
Check motor windings. Check motor windings.
Ok? Ok?
Yes Yes
Motor ok. Motor ok.
Check RV connection on Check RV connection on
outdoor board. Ok? outdoor board. Ok?
Yes Yes
Check RV output on outdoor Check RV output on outdoor
board. Ok? board. Ok?
Yes Yes
Check RV solenoid. Ok? Check RV solenoid. Ok?
Yes Yes
Replace reversing valve. Replace reversing valve.
Fig. 39 – Reversing Valve
No No
Clear blockage Clear blockage
No No
Fix connection Fix connection
No No
Replace Motor Replace Motor
Fig. 38 – Motors
No No
Clean or repair the Clean or repair the
connection connection
No No
Replace outdoor board Replace outdoor board
No No
Replace solenoid Replace solenoid
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