System Set Up; Dip Switch Functions - Mitsubishi Electric ecodan EHST20 Série Manuel D'installation

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System Set Up

System Set Up

5.1 dip Switch Functions

Located on the FTC4 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 Table 5.1.1.
Make sure to turn off both indoor unit and outdoor unit power supplies before
changing the switch settings.
dip switch Function
SW1 SW1-1 Boiler
SW1-2 Heat pump maximum outlet water temperature
SW1-3 DHW tank
SW1-4 Immersion heater
SW1-5 Booster heater
SW1-6 Booster heater function
SW1-7 Outdoor unit type
SW1-8 Wireless remote controller
SW2
SW2-1 Room thermostat1 input (IN1) logic change
SW2-2 Flow switch1 input (IN2) logic change
SW2-3 Booster heater capacity restriction
SW2-4
Automatic switch to backup heat source operation
SW2-5
(When outdoor unit stops by error)
SW2-6 Mixing tank
SW2-7 2-zone temperature control
SW2-8
SW3
SW3-1 Room thermostat 2 input (IN6) logic change
SW3-2 Flow switch 2 input (IN3) logic change
SW3-3 Flow switch 3 input (IN7) logic change
SW3-4
SW3-5 Heating mode function *3
SW3-6
SW3-7
SW3-8
SW4 SW4-1
SW4-2
SW4-3
SW4-4
SW4-5 Emergency mode (Heater only operation)
SW4-6 Emergency mode (Boiler operation)
note: 1. When the cylinder unit is connected with a PUHZ-rP 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. if emergency mode is no longer required, return the switch to OFF position.
21
WITHOUT Boiler
55ºC
WITHOUT DHW tank
WITHOUT Immersion heater
WITHOUT Booster heater
For heating only
Split type
WITHOUT Wireless remote controller WITH Wireless remote controller
Zone1 operation stop at thermostat
short
Failure detection at short
Inactive
—
Inactive
WITHOUT Mixing tank
Inactive
—
Zone2 operation stop at thermostat
short
Failure detection at short
Failure detection at short
—
Inactive
—
—
—
—
—
—
—
Normal
Normal
OFF
WITH Boiler
60ºC
WITH DHW tank
WITH Immersion heater
WITH Booster heater
For heating and DHW
Packaged type
Zone1 operation stop at thermostat
open
Failure detection at open
Active
—
Active *2
WITH Mixing tank
Active
—
Zone2 operation stop at thermostat
open
Failure detection at open
Failure detection at open
—
Active
—
—
—
—
—
—
—
Emergency mode (Heater only operation)
(To be activated only when powered ON)
Emergency mode (Boiler operation)
(To be activated only when powered ON)
<Table 5.1.1>
SW4
SW2
SW3
<Figure 5.1.1>
default settings:
On
indoor unit model
OFF
ON *1
ON
OFF: Except
EHST20C-*M*HB
EHPT20-*M*HB
ON : EHST20C-*M*HB
EHPT20X-*M*HB
ON
ON
OFF: EHST20C-*M**B
ON : EHPT20X-*M**B
OFF
OFF
ON
OFF: Except
EH*T20*-VM2*B
ON : EH*T20*-VM2*B
— OFF
OFF
OFF
OFF
— OFF
OFF
OFF
OFF
— OFF
OFF
— OFF
— OFF
— OFF
— OFF
— OFF
— OFF
— OFF
OFF *4
OFF *4
SW1