Samsung AM072BXV Series Service Manual page 127

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-39 CCH wire breaking error (cont.)
Outdoor unit
( Water Cooled )
display
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost Timer Fan
Indoorunit
display
×
※ ● : ON ◑ : Flash ×: OFF
Judgment
• Refer to the judgment method below.
Method
Cause of
• CCH Connector PBA is not connected / Compressor Top sensor breakaway / Own problem of CCH
problem
1. Judgment Method (2hours after reset or power on, It will be judged once.)
① Compressor Top temperature at the time of judgment- Tini < 2℃ ( ※ Tini : Power on or temperature of initial compressor Top after reset )
② Compressor Top temperature at the time of judgment- suction1 temp. sensor < 30℃
③ Outdoor temperature < 30℃
④ UP state
※ If all the conditions are satisfied at the same time : Mark the CCH wire breaking error (E445)
Is the CCH connector connected to PBA?
Is the compressor Top temperature
sensor fixed in correct position?
(500~700 Ω /infinite for disconnection)
Does the E445 error occur even after
the outdoor unit K3" RESET?
Samsung Electronics
Filter/
MPI
× ◑ ◑ ◑
Yes
Yes
Is CCH resistance normal?
Yes
Yes
Replace the PBA.
Cassette (4/Mini4 Way)
Operation Defrost Timer Filter Operation Timer Turbo 24℃
× ◑ ◑
No
No
No
No
Wall-mounted (NeoForte)
◑ ◑ ◑
●
Connect.
Fix the compressor Top temperature
sensor in
correct position.
Change CCH.
Normal Operation.
27℃
◑ ×
121