Mitsubishi Electric ecodan EHPX-VM2C, Service Manual

Page: 15 / 84

15
Automatic switch to heat source only 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 er -
ror 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.)
6-6. DIP switch setting
Located on the FTC printed circuit board are 5 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 in the table below.
Make sure to turn off both indoor unit and outdoor unit power supplies before
changing the switch settings.
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 OFF
SW1-4 Immersion heater WITHOUT Immersion heater WITH Immersion heater OFF
SW1-5 Booster heater WITHOUT Booster heater WITH Booster heater
OFF: E***-M*C
ON : E***-*M2/6/9C
SW1-6 Booster heater function For heating only For heating and DHW
OFF: E***-M*C
ON : E***-*M2/6/9C
SW1-7 Outdoor unit type Split type Packaged type
OFF: E*S*-*M*C
ON : EHPX-*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 E***-VM2*C
ON : E***-VM2*C
SW2-4 Cooling mode function Inactive Active
OFF: Except ERS*-*M**C
ON : ERS*-*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 OFF
SW3-8 Heat meter WITHOUT Heat meter WITH Heat meter OFF
SW4 SW4-1 Multiple outdoor units control
Inactive Active OFF
SW4-2 Position of multiple outdoor units control *7 Slave Master 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
DHW tank water temperature over heat protection (L4) Active Inactive *8 OFF
SW5-2 — — — OFF
SW5-3
SW5-4
SW5-5
SW5-6
SW5-7
SW5-8
— — — OFF
Note:
*1. When the hydrobox is connected with a PUHZ-RP/SUHZ-SW outdoor unit of which maximum outlet water temperature is 55ºC, DIP SW1-2 must be changed to OFF.
*2. 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 hydrobox 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 40. )
*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. Active only when SW4-1 is set to ON.
*8. Please make sure to have necessary overheat protection on locally supplied solar thermal system side to secure safety, as the tank temperature coulld be much higher (than current).
SW1
SW3
SW4
SW2
SW5
SW5-3 SW5-4 SW5-5 SW5-6 SW5-7
E*SC-*M*C ON ON ON ON OFF
E*SD-*M*C ON OFF OFF ON OFF
EHPX-*M*C OFF OFF OFF OFF OFF
Capacity code
OCH571