Mitsubishi EHST20C-VM2C - Indoor unit only operation; Emergency operation

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Indoor unit only operation
Indoor unit
Necessary
Heat pump
Not necessary
Main remote controller Necessary
DIPswitchsetting Electric heater
SW4-4 ON, SW4-5 ON
Boiler
SW4-4 ON, SW4-6 ON
Settingrangeforowtemp. 25–60°CSelectable
Settingrangefortanktemp. 40–60°C Selectable
Indoor unit only operation
Inindoorunitonlyoperation,anoperationwithoutconnectingoutdoorunitispossible.
When in Indoor unit only operation the main control has control functions.
<Heater>
HeatingforDHWandspaceheatingisprovidedbytheheater.
•Activatingindoorunitonlyoperationmode
Toactivateindoorunitonlyoperationseethefollowing:
1.SwitchOFFthebreakerfortheoutdoorunit(orbothbreakersifcylinderpoweredindependently).
2.ChangeDIPswitchSW4-4andSW4-5toON.
3.SwitchONthebreaker(s).
4.Indoorunitonlyoperationisnowactivated.
•Deactivatingindoorunitonlyoperationmode
Todeactivateindoorunitonlyoperationseethefollowing:
1.SwitchOFFthebreakerfortheoutdoorunit(orbothbreakersifcylinderpoweredindependently).
2.ChangeDIPswitchSW4-4andSW4-5toOFF.
3.SwitchONthebreaker(s).
4.Indoorunitonlyoperationisnowdeactivated.
<Boiler>
Heatingforspaceheatingisprovidedbytheboiler.
•Activatingindoorunitonlyoperationmode
Toactivateindoorunitonlyoperationseethefollowing:
1.SwitchOFFthebreakerfortheoutdoorunit(orbothbreakersifcylinderpoweredindependently).
2.ChangeDIPswitchSW4-4andSW4-6toON.
3.SwitchONthebreaker(s).
4.Indoorunitonlyoperationisnowactivated.
•Deactivatingindoorunitonlyoperationmode
Todeactivateindoorunitonlyoperationseethefollowing:
1.SwitchOFFthebreakerfortheoutdoorunit(orbothbreakersifcylinderpoweredindependently).
2.ChangeDIPswitchSW4-4andSW4-6toOFF.
3.SwitchONthebreaker(s).
4.Indoorunitonlyoperationisnowdeactivated.
Emergency operation
Inemergencyoperation,anoperationwithoutconnectingoutdoorunitandmainremotecontrolleris
possible.
WheninEmergencyoperationthemaincontrolhasNOcontrolfunctions.
Spaceheatingowtemp.isrestarted40°C and DHW tank temp. is restricted 50°C. *1
<Heater>
HeatingforDHWandspaceheatingisprovidedbytheheater.
•Activatingemergencyoperationmode
Toactivateemergencyoperationseethefollowing:
1.SwitchOFFthebreakerfortheoutdoorunit(orbothbreakersifcylinderpoweredindependently).
2.ChangeDIPswitchSW4-5toON.
3.SwitchONthebreaker(s).
4.Emergencyoperationisnowactivated.
•Deactivatingemergencyoperationmode
Todeactivateemergencyoperationseethefollowing:
1.SwitchOFFthebreakerfortheoutdoorunit(orbothbreakersifcylinderpoweredindependently).
2.ChangeDIPswitchSW4-5toOFF.
3.SwitchONthebreaker(s).
4.Emergencyoperationisnowdeactivated.
<Boiler>
Heatingforspaceheatingisprovidedbytheboiler.
•Activatingemergencyoperationmode
Toactivateemergencyoperationseethefollowing:
1.SwitchOFFthebreakerfortheoutdoorunit(orbothbreakersifcylinderpoweredindependently).
2.ChangeDIPswitchSW4-6toON.
3.SwitchONthebreaker(s).
4.Emergencyoperationisnowactivated.
•Deactivatingemergencyoperationmode
Todeactivateemergencyoperationseethefollowing:
1.SwitchOFFthebreakerfortheoutdoorunit(orbothbreakersifcylinderpoweredindependently).
2.ChangeDIPswitchSW4-6toOFF.
3.SwitchONthebreaker(s).
4.Emergencyoperationisnowdeactivated.
WARNING
Do not attempt to change the DIP switches whilst the breaker(s) are ON as this could result in
ELECTROCUTION.
Emergency operation
Indoor unit
Necessary
Heat pump
Not necessary
Main remote controller Not necessary
DIPswitchsetting
Electric heater
SW4-5 ON
Boiler
SW4-6 ON
Settingrangeforowtemp.
Fixedat40°C
Settingrangefortanktemp.
Fixedat50°C *1
*1Default setting is50°C.Oncesystemhasstarted running,
emergencyoperationrunsatthelatestsettemp.
OCH570C