Samsung Electronics3-5
Alignment and Adjustments
3-1-2 Outdoor Unit
Communication error (indoor unable to receive data)
Communication cable
connection
Communication error (outdoor unable to communicate) Indoor unit
Indoor unit room temperature sensor error (Open/Short) Indoor unit
Indoor unit heat exchanger in temperature sensor error (Open/Short) Indoor unit
Indoor unit heat exchanger out temperature sensor error (Open/Short) Indoor unit
Indoor unit sensor error - Evaporator pipe in sensor detached Indoor unit
Indoor unit sensor error - Evaporator pipe out sensor detached Indoor unit
Indoor unit heat exchanger in & out temperature sensor detached Indoor unit
More than 2 indoor units cool and heat simultaneously
Indoor unit operation
mode
The number of indoor unit mismatched Communication wiring
Communication error (outdoor unable to receive data) Communication wiring
Communication error between 2 microcontroller on the outdoor PCB Outdoor unit PCB
Outdoor temperature sensor error (Short/Open)
Temperature sensor
– Error level : over 4.9V(-50˚C) under 0.4V(93˚C)
Condenser temperature sensor error (Short/Open)
Temperature sensor
– Error level : over 4.9V(-50˚C) under 0.4V(93˚C)
Condenser temperature sensor detached Temperature sensor
Compressor discharge sensor error (Short/Open)
– Error check condition : outdoor temperature over -20˚C Temperature sensor
– Error level : over 4.95V(-30˚C) under 0.5V(151˚C)
Compressor discharge sensor detached Temperature sensor
Compressor OLP sensor error (Short/Open)
– Error check condition : outdoor temperature over -20˚C Temperature sensor
– Error level : over 4.95V(-30˚C) under 0.5V(151˚C)
Indoor unit heat exchanger freezing and compressor stop (cooling mode)
Check pipe matching
also(indoor-outdoor)
Outdoor unit overload and compressor stop (protection control in heating mode)
Check pipe matching
also(indoor-outdoor)
Outdoor unit high discharge temperature and compressor stop Check pipe matching
(protection control in heating mode) also(indoor-outdoor)
Main checking Point
Display
Explanation
24296A(1)_1 11/11/05 5:03 PM Page 2-34
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