Model reference
Daewoo DSB-121LH
Air Conditioner
7 documents8 error codes6 service modes
Available documentation
Service Manual
- Service Manual Split System Air Conditioner Model: DSB-121LH50 pg
- Daewoo DSB 070 091 121 122 240 LH CDC 1573 Service Manual96 pg
- Service Manual Split System Air Conditioner113 pg
- Service Manual Split System Air Conditioner Model: DSB-F240L-R53 pg
- Daewoo DSB-F071L / DSB-F092L Service Manual103 pg
- Service Manual Split System Air Conditioner Model: DSB-183PH60 pg
- Service Manual - Split System Air Conditioner131 pg
MyPros+ Max
Diagnose your Daewoo DSB-121LH.
- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
- Verified part numbers when replacement is needed
Start diagnosing
$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax
Error codes (8)
CodeMeaning
1 blinkRoom sensor open or short circuit; unit continuously operates at fixed room…2 blinksIndoor coil sensor open or short, outdoor coil sensor open or short, compressor…continuous blinkUnit does not work due to indoor coil sensor open/short, outdoor coil sensor…continuous ON blinkRoom sensor open or shortE1Room sensor open or short circuit detected (ON lamp blinks continuously for 8…E2Indoor coil sensor or outdoor coil sensor open or short circuit (ON lamp does…E3Compressor or electrical parts of compressor errorE4Gas leak detectedService modes (6)
- Emergency Operation["Set the select switch on the switch panel to the Emergency position (away from Remote).","Unit…
- Emergency Operation / Test Mode["Open the front panel of the indoor unit to access the switch panel.","Locate the Emergency/Remote…
- Self-Diagnostic["The control automatically performs diagnostic tests to verify system integrity.","Error codes are…
- Self-Diagnostic FunctionThe control automatically runs diagnostic tests to verify system integrity
- Test Operating Mode["During test operating, Fan (Indoor, Outdoor) and Compressor run regardless of room temperature."]
- Test Operation["Activate test operating mode (via test/emergency switch on indoor unit)."]
Full entry steps, exit procedures, and test sequences are available in Max.
Related Daewoo air conditioner models
75,000+ service documents · 20,000+ error codes · 100+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax