Mitsubishi FDT125VNPWVH - (9) Heating overload protective control; (10) Heating low outdoor air temperature protective control; (11) Compressor overheat protection

'22 • PAC-SM-412
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32
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(a) Operating conditions
(b) Detail of operation
(10)
Heating low outdoor air temperature protective control
-1 14 6
Lower limit 45 rps
Lower limit 35 rps
Normal operation
Outdoor air temperature(°C)
Outdoor air temperature(°C)
38ºC.
H
lower
4
38 39 46 47
OFF
Upper limit 40rps
Lower limit 30rps
Upper limit 65rps
Lower limit 30rps
H
(c) Reset conditions
(c) Reset conditions
Wheneitherofthefollowingconditionissatised
(i)Theoutdoorairtemperature(TH2)ishigherthan6ºC.
(ii)Thecompressorspeedis0rps.
(iii)CompressorprotectionstartIIisactivate.
(11) Compressor overheat protection
(a) Purpose
Itisdesignedtopreventdeteriorationofoil,burnoutofmotorcoilandothertroubleresultingfromthecompressoroverheat.
(b) Detail of operation
(i)Speedsarecontrolledwithtemperaturedetectedbythesensormountedonthedischargepipe.
Discharge pipe temperature (˚C)
Lower limit
(4)
Afterlapseof3min.orover
(3)
Afterlapseof3min.orover
(3)
Afterlapseof3min.orover
(3)
4 rps
4 rps
(1)
0rps
(Example) Fuzzy
95 105 115
Notes (1)Whenthedischargepipetemperatureisintherangeof105-115ºC,thespeedisreducedby4rps.
(2)
Whenthedischargepipetemperatureisraisedandcontinuesoperationfor20secondswithoutchanging,thenthespeedisreducedagainby4rps.
(3) Ifthedischargepipetemperatureisintherangeof95-105ºCevenwhenthecompressorspeedismaintainedfor3minuteswhenthetemperatureisin
therangeof95-105ºC,thespeedisraisedby1rpsandkeptatthatspeedfor3minutes.Thisprocessisrepeateduntilthecommandspeedisreached.
(4) Lower limit speed
Cooling Heating
Lower limit speed
25 rps 32 rps
64
Normal operation
Lower limit 30rps
Outdoor air temperature (°C)
-10 -8 -1 1
Lower limit 60rps
Lower limit 60rps
(a) Operating conditions
(b) Detail of operation
(10) Heating low outdoor temperature protective control
-1 14 6
Lower limit 45 rps
Lower limit 35 rps
Normal operation
Outdoor air temperature(°C)
Outdoor air temperature(°C)
11ºC.
H
lower
4
11 13 16 17
OFF
Upper limit 65rps
Lower limit 30rps
Upper limit 65rps
Lower limit 30rps
H
(c) Reset conditions
(9) Heating overload protective control
(a) Operating conditions
(b) Detail of operation
65(65)rps
30(30)rps
Note (1) Values in ( ) are for outdoor air temperature at 17
(i)
(ii)
calculation exceeds
the upper limit, the upper limit value is maintained.
than that after
fuzzy calculation, the speed is kept to 30(30)rps. However, when the thermostat OFF, the speed is reduced to 0 prs.
When the outdoor air temperature (TH2) is 13°C or higher continues for 30 seconds while the compressor speed is other than 0 rps