Samsung AVXCSH022EE Service Manual page 131

Troubleshooting
■ Service Valve Auto Inspect
Outdoor unit display
(Operation)
Indoor unit display
Criteria Please refer to determining method below
Cause of problem Malfunction of service valve lock or 4-WAY VALVE or MAIN EEV
Is the service valve
of the installed outdoor unit
Did the 4-way valve,
Main EEV run normally?
Is there a suitable
amount of refrigerant
in the system?
1. Run test-run mode for at least 30 minutes
2. Run air operation for at least 10 minutes
3. Re-start auto inspect mode
● When "Inspection required" is determined for service valve, an error will be displayed on the relevant outdoor unit.
● When "Inspection required" is determined for service valve, auto inspect will end. If service valve is being inspected, please inspect the
service valves of both liquid line and gas line at the same time.
● If 4-Way valve, Main EEV inspection is required, please differentiate by analyzing the Data after running heating operation or test-run for
at least 1 hour.
● Normal inspections may be difficult if the outdoor unit is implanted or if defrost operation is running.
In this case, please run heating operation or test-run for at least 1 hour.
● Errors may occur even in normal conditions if outside of the guaranteed range.
4-40
(Print S-net pro result report "Inspection required")
◑ (Timer) ◑ (Fan) ◑ (Filter)
No
open?
Yes
No
Yes
No
Yes
(Defrost)
Open service valve
Inspect 4-way valve,
Main EEV Inspect system for leaks
❈ Please refer to 4-Way v/v, Main EEV inspection method
Insert vacuum/refrigerant
❈ Problematic 4-WAY VALVE operation symptoms
- Refrigerant-induced noise during compressor operation and Accum.
Intake side pipe temperature will be maintained at more than 10°C above
evaporation temperature
- During heating, indoor side Eva.In/Out temperature will be maintained at
minus (-) °C
❈ Problematic Main EEV operation symptoms
- During heating operation there will be faulty compressor intake overheat
control
: If operations are faulty when completely opened, the target degree
of overheating (1°C) will not be reached (0°C) while a low compressor
discharge temperature will be maintained
: If operations are faulty when completely closed, low pressure will fall and
the intake overheating of the compressor will increase excessively.
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