What To Check Before Diagnosis - Samsung AM032MNQDCH/AA Service Manual

4-3-3 What to check before diagnosis

4-3-3-1 Lamp combination expression method display (cassette type indoor unit)
- Slim 1-Way, 2 -Way, Mini 4-Way cassette type
Error detection and restart
When error occurs during operation, indicate a problem with LED flashes, and no other operations but LED stops.
When restarting operation with remote controller or switch, it will determine the appropriate error mode after normal operation
LED lamp display with error detection
Abnormal condition
Error on indoor temperature sensor (Short or Open)
1. Error on Eva-in sensor (Short or Open)
2. Error on Eva-out sensor (Short or Open)
3. Discharge sensor error (Short or Open)
Indoor fan error
1. Error on outdoor temperature sensor (Short or Open)
2. Error on cond sensor
3. Error on discharge sensor
Other outdoor unit sensor error that is not on the above list
1. When there is no communication between the indoor∙outdoor units
for
2 minutes
2. Communication error received from the outdoor unit
3. 3 miniute tracking error on outdoor unit
4. Communication error after tracking due to unmatching number of
installed units
5. Error due to repeated communication address
6. Communication address not confirmed Other outdoor unit
communication error that is not on the above list
Self diagnosis error display
1. Error due to opened EEV (2nd detection)
2. Error due to closed EEV (2nd detection)
3. Eva in sensor is detached
4. Eva out sensor is detached
5. Thermal fuse error (Open)
-
If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
-
If you re-operate the air conditioner, it operates normally at first, then detect an error again.
-
When E108 error occurs, change the address and reset the system.
Ex.) When address of the indoor unit #1 and #2 are set as 5, address of the indoor unit #1 will become 5 and indoor unit #2 will
display E108, A002.
Samsung Electronics
LED Display
Error code
Green Red
E121
E122
E123
E126
E154
E221
E237
E251
E101
E102
E202
E201
E108
E109
E151
E152
E128
E129
E198
Troubleshooting
: On : Flickering : Off
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