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MLCAC-UTSM-2010-10
Troubleshooting
Outdoor Units 83
2. E2 malfunction
E2 display
Communication malfunction between indoor IC and outdoor IC
Judge 3: Check whether the signal wiring between the indoor and
outdoor units is wrong polarity?
Connect the signal wiring correctly
Yes
No
Judge 4: Check whether the signal wiring between the indoor and
outdoor units is broken?
Yes
Replace the broken wiring
No
Judge 2: Check whether the signal wiring is shield cable or whether
the shield cable is earthed
Yes
Adopt the shield cable/ let shield cable earthed
No
Indoor or outdoor main board is broken. Replace the main
board until the malfunction disappears.
Judge 1: Check whether the indoor unit power is on
Turn on the indoor unit power
No
Yes
Summary of Contents for MLCAC-UTSM-2010-10
Page 1: ...MIDEA LCAC 50Hz R410A DC Inverter Service Manual 2011 ...
Page 2: ......
Page 4: ......
Page 16: ...Service Space MLCAC UTSM 2010 10 12 Four way Cassette Type 3 Service Space ...
Page 22: ...Field Wiring MLCAC UTSM 2010 10 18 Four way Cassette Type 10 Field Wiring Wiring chart ...
Page 23: ...MLCAC UTSM 2010 10 Field Wiring Four way Cassette Type 19 ...
Page 32: ...The Specification of Power MLCAC UTSM 2010 10 28 Duct Type 9 The Specification of Power ...
Page 33: ...MLCAC UTSM 2010 10 Field Wiring Duct Type 29 10 Field Wiring ...
Page 34: ...Field Wiring MLCAC UTSM 2010 10 30 Duct Type Air conditioner link circuit ...
Page 37: ......
Page 40: ...Service Space MLCAC UTSM 2010 10 58 Ceiling Floor Type 3 Service Space ...
Page 47: ...MLCAC UTSM 2010 10 Field Wiring Ceiling Floor Type 65 10 Field Wiring ...
Page 48: ...Field Wiring MLCAC UTSM 2010 10 66 Ceiling Floor Type ...
Page 51: ...MLCAC UTSM 2010 10 Service Space Outdoor Units 69 2 Service Space ...
Page 54: ...Wiring Diagrams MLCAC UTSM 2010 10 72 Outdoor Units MOUB 48HDN1 R ...
Page 60: ...Troubleshooting MLCAC UTSM 2010 10 78 Outdoor Units For Duct type ...
Page 89: ...MLCAC UTSM 2010 10 Control Control 107 Part 5 Control 1 Controller 108 ...