Mitsubishi FDUA125VNPWVH - Page 39

'22 • PAC-SM-412
-
38
-
(iv) Display sequence of error codes or inspection indicator lamps
■ Occurrence of one kind of error
 Displaysareshownrespectivelyaccordingtoerrors.
■ Occurrence of plural kinds of error
Section Category of display
Error code on remote
control
•Displaystheerrorofhigherpriority(Whenpluralerrorsarepersisting)
• Displaysthepresenterrors.(Whenanewerrorhasoccurredaftertheformererrorwasreset.)
Red LED on indoor unit
control PCB
■ Error detecting timing
Section Error description Error code Errordetectingtiming
Indoor
Draintrouble(Floatswitch
activated)
Wheneverfloatswitchisactivatedafter30secondshadpast
since power ON.
Communication error at
initial operation
“
WAIT
”
No communication between indoor and outdoor units is
established at initial operation.
Remote control
communication circuit error
Communication between indoor unit and remote control
is interrupted for more than 2 minutes continuously after
initial communication was established.
Communicationerrorduring
operation
Communication between indoor and outdoor units is
interrupted for more than 2 minutes continuously after
initial communication was established.
Excessivenumberof
connected indoor units by
controllingwithoneremote
control
Wheneverexcessivelyconnectedindoorunitsisdetected
after power ON.
Return air temperature sensor
anomaly
-50°Corlowerisdetectedfor5secondscontinuously
within60minutesafterinitialdetectionofthisanomalous
temperature.
Indoorheatexchanger
temperature sensor anomaly
-50°Corlowerisdetectedfor5secondscontinuously
within60minutesafterinitialdetectionofthisanomalous
temperature.
Or70°Corhigherisdetectedfor5secondscontinuously.
Outdoor
Outdoor air temperature
sensor anomaly
-55°Corlowerisdetectedfor5secondscontinuously
3timeswithin40minutesafterinitialdetectionofthis
anomalous sensor.
Or-55°Corhigherisdetectedfor5secondscontinuously
within20secondsafterpowerON.
Outdoorheatexchanger
temperature sensor anomaly
-55°Corlowerisdetectedfor5secondscontinuously
3timeswithin40minutesafterinitialdetectionofthis
anomalous sensor.
Or-55°Corlowerisdetectedfor5secondscontinuously
within20secondsafterpowerON.
Dischargepipetemperature
sensor anomaly
-25°Corlowerisdetectedfor5secondscontinuously
3timeswithin40minutesafterinitialdetectionofthis
anomalous sensor.
■ Information of maintenance
Remote
control
display
Maintenancecontent Content
M07
Indoorunitoverload
alarm
Indoorunitoverloadalarmsetting(Alarmsettingtemperature(Talm)canbesetat
5‒10°C.)
Cooling:(Returntemperature)-(Settingtemperature)>Talm.ReleasebelowTalm-2°C.
Heating:(Settingtemperature)-(Returntemperature)>Talm.ReleasebelowTalm-2°C.
M09
Drainpumpmotor
overcurrentdetection
Overcurrenttofthedrainpumpmotorisdetected.Checktheoperationofthedrain
pump.
M27
Defectivethehumidity
sensor
(detectiveelement,
broken wire, short-
circuit)
Thehumiditysensordetectsdisconnectionandshort-circuitformorethan10
minutes.