Daikin EKHBRD-AY1, Installation Manual

EKHBRD011~Y1

Indoor unit for air to water heat pump system

4PW54465-1C

Installation manual

14

Internal wiring - Parts table

Refer to the internal wiring diagram supplied with the unit. The
abbreviations used are listed below.

switch box components list

A1P............................ Main PCB

A2P............................ Remote controller PCB (user interface)

A3P............................ Control PCB

A4P......................* .... Inverter PCB

A4P..................... # .... Inverter control PCB

A5P......................* .... QA PCB

A5P..................... # .... Inverter PCB

A6P............................ Filter PCB

A7P............................ Digital I/O PCB (optional)

A8P............................ Demand PCB (optional)

A10P.......................... Thermostat PCB (optional)

A11P.......................... Receiver PCB (optional)

B1PH ......................... High pressure sensor

B1PL.......................... Low pressure sensor

BS1~BS4 (A4P).. # .... Push button

BS1~BS4 (A9P)...* .... Push button

C1 ........................* .... Capacitor

C1,C2 ................. # .... Filter capacitor

C1,C2 (A5P) ....... # .... PCB capacitor

C1~C3 (A4P) .......* .... PCB capacitor

C2,C3 ..................* .... Filter capacitor

DS1 (A*P) .................. Dipswitch

E7H............................ Bottom plate heater (only in combination with

ERRQ* outdoor unit or ERSQ* outdoor unit
with option EKBPHTH16A)

E1HC ......................... Crankcase heater

F1,F2 .................. # .... Inline fuse

F1U (A1P,A3P) .......... Fuse (T, 3.15 A, 250 V)

F1U (A6P)............* .... Fuse (T, 6.3 A, 250 V)

F1U,F2U (A4P) ... # .... Fuse (31.5 A, 500 V)

F1U,F2U (A7P) .......... Fuse (5 A, 250 V) (optional)

F3U,F4U ..............* .... Fuse (T, 6.3 A, 250 V)

F3U,F6U (A4P) ... # .... Fuse (6.3 A, 250 V)

H1P~H7P (A4P) . # .... PCB LED

H1P~H7P (A9P) ..* .... PCB LED

HAP (A*P).................. PCB LED

IPM1 ....................* .... Integrated power module

K1A............................ Interface relay

K1E,K2E .................... Electronic expansion valve

K1M,K2M............ # .... PCB contactor

K*R (A*P)................... PCB relay

K1S............................ 3-way valve (optional)

K2S............................ 2-way valve

M1C ........................... Compressor

M1F,M2F.................... Switch box cooling fan

M1P ........................... DC inverter pump

PC (A11P) ................. Power circuit (optional)

PHC1 ......................... Optocoupler input circuit

PS (A*P) .................... Switching power supply

Q1DI,Q2DI................. Earth leakage protector (field supply)

Q2L............................ Thermal protector water piping

R1 (A5P)............. # .... Resistance

R1,R2 (A4P) ........* .... Resistance

R1L ......................* .... Reactor

R1L~R3L ............ # .... Reactor

R1H (EKRTR) ............ Humidity sensor (optional)

R1T (EKRTW/R) ........ Ambient sensor (optional)

R2T (EKHTS*) ........... Domestic hot water tank thermistor (optional)

R2T (EKRTETS*)....... External sensor (floor or ambient) (optional)

R3T............................ Liquid thermistor R410A

R4T ............................Returning water thermistor

R5T ............................Leaving water thermistor

R6T ............................Discharge thermistor

R7T ............................Liquid thermistor R134a

R8T ............................Fin thermistor

RC (A*P) ....................Receiver circuit

S1PH..........................High pressure switch

S1S ............................Benefit kWh rate power supply contact (field

supply)

S3S ............................Mixing station input 1 (field supply)

S4S ............................Mixing station input 2 (field supply)

SS1 (A1P) ..................Selector switch (emergency)

SS1 (A2P) ..................Selector switch (master/slave)

SS1 (A7P) ..................Selector switch (optional)

TC (A*P).....................Transmitter circuit

T1R,T2R (A*P)...........Diode bridge

T3R ..................... * ....Power module

V1C~V8C ............ * ....Ferrite core noise filter

V1C~V12C ..........# ....Ferrite core noise filter

X1M~X3M ..................Terminal block

X1Y~X4Y ...................Connector

X*M (A*P)...................Terminal block on PCB (optional)

Y1R ............................4-way valve

Z1F~Z5F (A*P) ..........Noise filter

*

V1 models only

#

Y1 models only

System overview of field wiring

■

Most field wiring on the indoor unit side is to be made on the
terminal block inside the switch box. To gain access to the
terminal blocks, remove switch box service panel. Refer to the
unit switch box cover for instructions how to remove this panel
and gain access to the inside of the switch box.

■

Cable tie mountings are provided at the wiring entries of the
switch box. See 

"Switch box main components" on page 7

.

NOTE

■

The electrical connection diagram can be found
on the inside of the switch box cover.

■

Install the indoor and outdoor unit, power supply
cable and communication cable(s) at least 1
meter away from televisions or radios to prevent
image interference or noise.
(Depending on the radio waves, a distance of 1
meter may not be sufficient to eliminate the
noise.)