Daikin EUWY 24KBZW1 Series, Service Manual

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ESIE11-02 Inputs and Outputs Overview
Part 3 – Troubleshooting 3–5
3 3
4
5
1
1.3 Inputs/outputs overview of the I/O PCB: EUWA*5-24KBZW1 and
EUWY*5-24KBZW1
Digital inputs to I/O
PCB The table below describes the digital inputs to the I/O PCB.
Digital outputs to
I/O PCB The table below describes the digital outputs to the I/O PCB.
Description
Output from
digital
controller
Output
controller
Open = 0 Closed = 1
DI1 Reversed phase detection (L1-N)
DI2 Reversed phase detection (N-L3)
DI3 M1C detection X C1/2NO1 M1C status = OFF M1C status = ON
DI4 M2C detection X C1/2NO2 M2C status = OFF M2C status = ON
DI5 Safety devices detection X C5-NO5 No alarm present Alarm present
DI6 Pump detection Pump status =
OFF Pump status = ON
DI9 Pump request X C1/2-NO3 Request to switch
off pump Request to switch
on pump
DI10 Reverse valve request X C1/2-NO4 Request to switch
the pump off Request to switch
the pump off
Description
Wiring
diagram
symbol
Input
to
digital
con-
troller
Not active = 0 Active = 1
Normal
open/
normal
closed
DO1 Reversed phase protector RY1 X RPP alarm RPP alarm NO
DO3 Pump/general operation RY3 Pump off Pump on NO
DO4 Fan speed relay 1 RY4-24 Fan speed relay
off Fan speed relay
on NO
DO5 Fan speed relay 2 RY5-25 Fan speed relay
off Fan speed relay
on NO
DO6 Heater tape RY6 ON OFF NO
DO7 Reversing valve (circuit 1) or
reversing valve of water circuit RY7 OFF (heating) ON (cooling) NO
DO8 Reversing valve (circuit 2) RY8 OFF (heating) ON (cooling) NO
DO9 M1C off (during defrost) RY9 M1C OFF Not (M1C off) NO
DO10 M2C off (during defrost) RY10 M2C OFF Not (M2C off) NO
DO12 Fan speed relay 3 RY12-22 Fan speed relay
off Fan speed relay
on NO
DO27 Reversing valve of water circuit RY27 Reverse valve off Reverse valve on NO