Mitsubishi FDUA125VNPWVH - Page 17

'22 • PAC-SM-412
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16
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(c) Operation check mode
Thereisnocommunicationwiththeoutdoorunitbutitallowsperformingoperationinrespectivemodesbyoperating
the remote control.
(d)Drainpumptestrunmode
Asthedrainpumptestrunisestablished,thedrainpumponlyoperatesandduringtheoperationprotectivefunctionsby
themicrocomputerofindoorunitbecomeineective.
(15) Heating overload protection
(a)Iftheindoorheatexchangertemperature(detectedwithThi-R)at63°Corhigherisdetectedfor2secondscontinuously,
the compressor stops.When thecompressor is restarted after a 3-minute delay,if a temperature at 63°Cor higher is
detectedfor2secondscontinuouslywithin60minutesafterinitialdetectionandifthisisdetected5timesconsecutively,
thecompressor stopswiththe anomalousstop(E8).Anomalousstopoccursalsowhentheindoor heatexchanger
temperatureat63°Corhigherisdetectedfor6minutescontinuously.
56
63
Indoor heat exchanger temperature (°C)
Compressor ON
Compressor OFF
(b) Indoor fan speed selection
If,afterseconddetection ofheatingoverload protectionupto fourth,theindoor fanissetatbelowHiwhenthe
compressor is turned ON, the indoor fan speed is increased by 1.
(16) Anomalous fan motor
(a)Afterstartingthefanmotor,ifthefanmotorspeedis200min
-1
orlessisdetectedfor30secondscontinuouslyand4
timeswithin60minutes,thenfanmotorstopswiththeanomalousstop(E16).
(b)Ifthe fan motor failstoreachat-50 min
-1
(FDU,FDUA:-500min
-1
)lessthan the required speed, itstopswiththe
anomalousstop(E20).
•Compressorforcedotemperature(FDTonly)
Hs
>
50%Hs
≦
50%
Item
Symbol
Low High
Item
Symbol
Low High
A 1.0 2.5 A -0.5
1 .0
(b) Selection of indoor fan speed
If it enters thefrost prevention controlduring cooling operation(including dehumidifying), the indoorfan speed is
switched.
(i)Whentheindoorreturnairtemperature(Thi-A)is18°Corhigherandtheindoorheatexchangertemperature(detected
withThi-R) detects thecompressorfrequencydrop start temperatureA°C+1°C,indoor fan speed isincreased by
20min
- 1
.
(ii) If the phenomenon of (i)aboveisdetectedagainaftertheaccelerationofindoorfan,indoorfanspeedisincreased
furtherby20min
- 1
.
Note (1) Indoor fan speed can be increased by up to P-Hi.
(14) Cooling, dehumidifying frost protection
(a)  To prevent frosting duringcooling mode ordehumidifying mode operation, the compressor-OFF if theindoor heat
exchanger temperature (detectedwithThi-R) drops to 1.0 °C or lowerat 4 minutes after the compressor-ON. If the
indoorunitheatexchangertemperatureis1.0°Corlowerafter5minutes,theindoorunitiscontrolledcompressor-OFF.
Ifitbecomes10°Corhigher,thecontrolterminates.
 •Frostpreventiontemperaturesettingcanbeselectedwiththe
indoorunitfunctionsettingofthewiredremotecontrol.
Symbol
Item
A
Temperature-Low(Factorydefault) 1.0
Temperature-High 2.5
10A
Indoor heat exchanger temperature (°C)
Compressor-OFF
Compressor-ON capable
5 minutes
timer
SRC40~60
FDC100~140
Model
Symbol
A
4
4
1
1
1.0
1.0
2.5
2.5
BC D