Samsung AVMKH020EA0 Service Manual page 259

8
Troubleshooting
8-2-77. Compression rate control
Outdoor unit display
Indoor unit display
Judgment method
Causes
Is the service vale opened all?
Check the PWM valve coil
(The same condition with that
Cooling
Remove the pollutions and
obstacles of outdoor inlet and
discharge.
Check if the outdoor fan is
operated normally.
Is high/low pressure normal?
- When the rate of (High pressure +1)/(Low pressure +1) maintains over 5 minutes with 8.5 over
Error reset(KEY 3)
Yes
and connecter.
Yes
Test operation
error occurred)
Heating
Remove the pollutions and
obstacles of indoor inlet and
discharge.
Check if the indoor fan is
operated normally.
Yes
Check completion
- 258 -
No
Open the service valve.
No
Check the Coil attaching and the
connection of connecter.
S-net connection (Essential)
Check the quantity of refrigerant
No
Operate the indoor/outdoor EEV
Check the EEV