System Set Up; Dip Switch Functions - Mitsubishi Electric EHST20-Serie Installationshandbuch

5

System Set Up

5.1 dip Switch Functions

Located on the FTC3 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...
dip switch
SW
SW-
Heat pump maximum outlet water
SW-2
temperature
DHW tank
SW-3
Immersion heater
SW-4
Booster heater
SW-5
Booster heater function
SW-6
Outdoor unit type
SW-7
Wireless remote controller
SW-8
Room thermostat input (IN1) logic change
SW2
SW2-
Flow switch input (IN2) logic change
SW2-2
Booster heater capacity restriction
SW2-3
SW2-4
Automatic switch to backup heater only op-
SW2-5
eration (When outdoor unit stops by error)
SW2-6
SW2-7
SW2-8
SW3
SW3-
SW3-2
SW3-3
SW3-4~8
SW4
SW4-~4
Emergency mode (Heater only operation)
SW4-5
SW4-6
notes: 1. For packaged model system, the max outlet water temperature is always 60°C so default dip switch SW1-2 is On.
For split model system, the max outlet water temperature is usually 55°C except in the case of PUHZ-HrP outdoor model where the max outlet
water temperature is 60°C and diP switch SW1-2 should be changed to On.
2. if emergency mode is no longer required, please turn off both outdoor and indoor unit power supply before returning SW4-5 to OFF position.
3. For safety reasons, this function is not available for certain errors. (System operation must be stopped and only pump keeps running.)
external output (OUt11) will be available.
Function
—
55 °C
WITHOUT DHW tank
WITHOUT immersion heater
WITHOUT booster heater
For heating only
Split type
WITHOUT wireless remote controller WITH wireless remote controller
Operation stop at thermostat short
Failure detection at short
Inactive
—
Inactive
—
—
—
—
—
—
—
—
Normal
—
OFF
—
60 °C
WITH DHW tank
WITH immersion heater
WITH booster heater
For heating and DHW
Packaged type
Operation stop at thermostat open
Failure detection at open
Active
—
Active ( 3)
—
—
—
—
—
—
—
—
Emergency mode (Heater only operation)
(To be activated only when powered ON)
—
<Table 5..>
SW SW2
SW3
<Figure 5..>
On default (indoor unit ref.)
OFF
—
OFF:EHS****-*M** ( 1)
ON :EHP****-*M**
ON
OFF:EH*****-*M**
ON :EH*****-*M*H*
ON
ON
OFF:EHS****-*M**
ON :EHP****-*M**
OFF
OFF
ON
OFF
ON: EHPT20X-VM2HA
OFF
—
OFF
OFF
—
OFF
—
OFF
—
OFF
—
OFF
—
— OFF
— OFF
— OFF
OFF ( 2)
OFF
—
SW4
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