Error Contents - Friedrich MR18Y3F Service Manual

ERROR CONTENTS

Model : MW18Y3F / MR18Y3F
Self-diagnosis function table (Flashing LED Display)
* Detailed Trouble Display (secondary level) can be indicated by pressing Test Operation button.
Trouble Display (primary)
Error Operation
Serial signal Normal
error
Indoor unit 0.5sec
thermistor 2 times
error
Outdoor unit 0.5sec
thermistor 3 times
error
Indoor unit 0.5sec
control error 4 times
2006.02.20
Detailed Trouble Display (by Test Button)
Timer Error
1 sec Serial reverse signal error
blinking at operation start up
Signal reverse signal error
during operation
Serial forward signal error
at operation start up
Serial forward signal error
during operation
0.1sec Indoor temperature
blinking thermistor open
Pipe thermistor
open or short
0.1sec Discharge thermistor
blinking open or short
Heat exchanger
thermistor open
Outdoor temperature
thermistor open or short
Forced automatic SW
0.1sec
welded
blinking
Main relay welded
Power interruption error
Operation Timer
When a signal is not read continuously for 10 secs
0.1sec 0.5sec
from power relay ON immediately after operation starts
blinking 2 times
>>Cooling 0 code transmission, automatic reset
When a signal is not read for 20 secs thereafter
>>Trouble display continues and power relay OFF
>>Permanent stop
0.1sec 0.5sec When a signal is not read continuously for 10 secs
from power relay ON immediately after operation starts
blinking 2 times
>>Cooling 0 code transmission, automatic reset
When a signal is not read for 20 secs thereafter
>>Trouble display continues and power relay OFF
>>Permanent stop
0.1sec 0.5 sec Normal Serial Forward Signal can not be
blinking 4 times received more than 10 secs
>>Releases when it becomes normal
0.1sec 0.5sec Normal Serial Forward Signal can not be
blinking 5 times
received more than 10 secs ( after receiving
effective forward transfer signal)
>>Releases when it becomes normal
0.5sec Thermistor detection value is open when
0.1sec
2 times AC plug is inserted
blinking
>>Releases when value becomes normal
0.1sec 0.5sec Thermistor detection value is open or short
blinking 3 times when AC plug is inserted
>>Releases
0.1sec 0.5sec Thermistor detection value is open or short
blinking 2 times
>>Outdoor unit stops
0.1sec 0.5sec Thermistor detection value is open
blinking 3 times
>>Outdoor unit stops
0.1sec 0.5sec Thermistor detection value is open or short
blinking 4 times
>>Outdoor unit stops
0.5sec Forced Auto SW is ON for more than
0.1sec
2 times 10 secs continuously
blinking
>>Error is indicated while it is ON
Normal Operation other than error indication
0.1sec 0.5sec Serial Reverse Signal is received 1 min.
blinking 3 times after Main relay becomes OFF
>>Error is indicated while serial reverse
signal is input on normal operation
Normal operation except error indication
0.1sec 0.5sec 50/60Hz is not detected after 4 secs of
blinking 4 times power ON.
>>Error is indicated and unit is stopped
10
Detailed Error Item
when value becomes normal
Releases when it becomes normal
Releases when it becomes normal
Releases when it becomes normal