Mitsubishi EHST20C-VM2C User Manual

33
Automatic switch to backup heat source operation
Back-upheatsourceoperation(*1)willautomaticallyrunwhentheoutdoorunitstopsabnormally.Toenablethefunction,switchDIPSW2-5toON.Duringtheback-
upoperation,anerrorcode(s)andthecontactnumberwillbedisplayedalternately.Externaloutput(OUT11)willbeavailable.
Toclearthefault(s),resetthepowerbreakersontheindoorandoutdoorunits.
<Applicable error codes (*2)>
E6 to E9, ED, P6, P8, U1 to U8, UD, UE, UF, UL, UP
(*1)Prolongedrunningoftheback-upoperationmayaffectthelifeoftheheatsource.
(*2)Forsafetyreasons,thisfunctionisnotavailableforcertainfaults.(Systemoperationmustbestoppedandonlypumpkeepsrunning.)
6-19. DIP switch functions
Locatedonthe FTC printed circuit boardare4setsofsmallwhiteswitches
knownasDIPswitches.The DIPswitchnumberis printed onthecircuitboard
nexttotherelevantswitches.ThewordONisprintedonthecircuitboardandon
theDIPswitchblockitself.Tomovetheswitchyouwillneedtouseapinorthe
corner of a thin metal ruler or similar.
DIPswitchsettingsarelistedbelowinthetablebelow.
OnlyanauthorisedinstallercanchangeDIPswitchsettingunderone'sownre-
sponsibilityaccordingtotheinstallationcondition.
Beforechanging any switchsettings,ensurepowersuppliesto indoor andout-
doorunitsareisolated/poweredoff.
SW1
SW3
SW4
SW2
SW5
DIP switch Function OFF ON
Default settings:
Indoor unit model
SW1
SW1-1 Boiler WITHOUT Boiler WITH Boiler OFF
SW1-2 Heatpumpmaximumoutletwatertemperature 55ºC 60ºC ON
*
1
SW1-3 DHW tank WITHOUT DHW tank WITH DHW tank ON
SW1-4 Immersion heater WITHOUT Immersion heater WITH Immersion heater
OFF:
E**T20*-*C
ON : EH*T20*-*HC*
SW1-5 Booster heater WITHOUT Booster heater WITH Booster heater
OFF: E**T20*-M*C*
ON :
E**T20*-*M 2/6/9*C
SW1-6 Booster heater function Forheatingonly ForheatingandDHW
OFF: E**T20*-M*C*
ON :
E**T20*-*M 2/6/9*C
SW1-7 Outdoor unit type Split type Packagedtype
OFF: E*ST20*-*M**C*
ON :
EHPT20X-*M**C*
SW1-8 Wireless remote controller WITHOUT Wireless remote controller WITH Wireless remote controller OFF
SW2
SW2-1 Roomthermostat1input(IN1)logicchange
Zone1 operation stop at thermostat short Zone1 operation stop at thermostat open OFF
SW2-2 Flowswitch1input(IN2)logicchange Failure detection at short Failure detection at open OFF
SW2-3 Booster heater capacity restriction Inactive Active
OFF:Except
EH*T20*-VM2*C
ON : EH*T20*-VM2*C
SW2-4 Coolingmodefunction Inactive Active
OFF: EH*T20*-*M**C*
ON :
ERST20*-*M**C
SW2-5
Automaticswitchtobackupheatsourceoperation
(When outdoor unit stops by error)
Inactive Active
*
2
OFF
SW2-6 Mixingtank WITHOUTMixingtank WITHMixingtank OFF
SW2-7 2-zonetemperaturecontrol Inactive Active
*
6
OFF
SW2-8 Flowsensor WITHOUTFlowsensor WITHFlowsensor ON
SW3
SW3-1 Roomthermostat2input(IN6)logicchange
Zone2 operation stop at thermostat short Zone2 operation stop at thermostat open OFF
SW3-2 Flowswitch2input(IN3)logicchange Failure detection at short Failure detection at open OFF
SW3-3 Flowswitch3input(IN7)logicchange Failure detection at short Failure detection at open OFF
SW3-4 Electricenergymeter WITHOUTElectricenergymeter WITHElectricenergymeter OFF
SW3-5 Heatingmodefunction
*
3
Inactive Active ON
SW3-6 2-zonevalveON/OFFcontrol Inactive Active OFF
SW3-7 HeatexchangerforDHW Coil in tank ExternalplateHEX ON
SW3-8 Heat meter WITHOUT Heat meter WITH Heat meter OFF
SW4
SW4-1 — — — OFF
SW4-2 — — — OFF
SW4-3 — — — OFF
SW4-4
Indoorunitonlyoperation(duringinstallationwork)
*
4
Inactive Active OFF
SW4-5 Emergencymode(Heateronlyoperation) Normal
Emergencymode(Heateronlyoperation) OFF
*
5
SW4-6 Emergencymode(Boileroperation) Normal Emergencymode(Boileroperation) OFF
*
5
SW5
SW5-1 — — — OFF
SW5-2 Advanced auto adaptation
*
7
Inactive Active
OFF: Other than R1/R2 mode
ls
ON: R1/R2 models
SW5-3
SW5-4
SW5-5
SW5-6
SW5-7
SW5-8 — — — OFF
Notes: *1. When the cylinder unit is connected with a PUMY-P/SUHZ-SW outdoor unit of which maximum outlet water temperature is 55ºC, DIP SW1-2 must be changed to OFF.
*2. External output (OUT11) will be available. For safety reasons, this function is not available for certain errors. (In that case, system operation must be stopped and
only the water circulation pump keeps running.)
*3. This switch functions only when the cylinder unit is connected with a PUHZ-FRP outdoor unit. When another type of outdoor unit is connected, the heating mode
function is active regardless of the fact that this switch is ON or OFF.
*4. Space heating and DHW can be operated only in indoor unit, like an electric boiler. (Refer to "Indoor unit only operation" in page 61. )
*5. If emergency mode is no longer required, return the switch to OFF position.
*6. Active only when SW3-6 is set to OFF.
*7. SW5-2, "Advanced auto adaptation" is available only for R1 and R2 models.
SW5-3 SW5-4 SW5-5 SW5-6 SW5-7
E*ST20C-*M*C* ON ON ON ON OFF
E*ST20D-*M*C* ON OFF OFF ON OFF
EHPT20X-*M*C* OFF OFF OFF OFF OFF
Capacity code
OCH570C

Mitsubishi EHST20C-VM2C Specifications

General

Brand	Mitsubishi
Model	EHST20C-VM2C
Category	Heat Pump
Language	English