Samsung AM038KXWDCH, Service Manual, Page: 124 / 295

Troubleshooting
Samsung Electronics 121
4-3-36 EVI EEV Open error
ఐ
For the indoor EEV leakage check, operate one of the indoor units in cooling mode and the others in fan mode.
· In case of normal units in fan mode, EVA In/Out temperatures become close to the room temperature within 5minutes.
· Change the cooling unit to the fan mode and one of the fan unit to the cooling mode, and then check again.
ఐ
If the refrigerant amount was excessively charged, DSH may be decreased during the cooling operation at low temperature.
ఐ
For the EVI EEV leakage check, check for the EVI in sensor temperature when the cooling operation with the EVI EEV 0step.
· Separate the EVI EEV connector from the HUB PBA, when the outdoor unit is off.
· In case of EVI EEV leakage in cooling mode, EVI In temperature at least 10
ఁ
lower than the outside temperature.
1. Cause of problem
Check the refrigerant
No
Reconnect connector
Is EVI EEV connector accurately connected to
PBA?
Yes
No
Reassemble coil
Is EEV coil accurately installed?
Yes
Abnormal
Replace Intercooler
Check for Intercooler leakage.
Normal
Check for Indoor Unit EEV leakage
Abnormal
Replace Indoor Unit EEV
Normal
Yes
Reinstall pipe
Is there a liquid-gas pipe directly connected to
each other?
No
Abnormal
Replace EVI EEV
Check for EVI EEV leakage.
Normal
Outdoor unit
display
Indoorunit
display
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Operation Defrost Timer Fan
Filter/
MPI
Operation Defrost Timer Filter Operation Timer Turbo
24
℃
27
℃
× × ◑ ◑ ◑ × ◑ ◑ ◑ ● ◑ ◑ ◑ ×
※ ● : ON ◑ : Flash ×: OFF
Judgment
Method
. DSH<5
ఁ
, EVI Out-EVI In<0
ఁ
& frequency> 65Hz 40 minutes maintaining
Cause of
problem
. EVI EEV and Intercooler leakage, excessive refrigerant amount, Outdoor Check Valve inserted opposite.
. Indoor Unit EEV leakage, direct connection between Indoor Liquid Pipe and the Gas Pipe.
4-3 Appropriate Measures for Different Symptom (cont.)