Inputs and Outputs Overview ESIE11-02
3–4 Part 3 – Troubleshooting
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1.2 Inputs and Outputs Overview: EUWA*5-24KBZW1 and EUWY*5-24KBZW1
Inputs/outputs The table below describes the relation between the wiring diagram symbols, the wiring connections
and the error codes.
For the exact location, see:
■ "PCB Layout of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1" on page 1–71.
■ "Wiring Diagram: EUWA*5-24KBZW1 and EUWY*5-24KBZW1" on page 1–75.
Type Device
Wiring
diagram
symbol
Wiring con-
nection
terminal
Error code Description
Analog
input
Sensor R3T X1/B1-GND e1 Inlet water temperature sensor
R4T X1/B2-GND e2 Outlet water temperature sensor
Digital input Trans-
ducer
K4S + S1HP
+ QID
K5S + S2HP
+ Q2D
X1/ID3-GND hp1 Overcurrent relay + high pressure switch +
discharge protector
S4LP/S5LP X1/ID4-GND lp1 Low-pressure switch
Control
contacts
S9S (field) X1/ID5-GND (h7) Switch for remote start/stop or dual setpoint
S7S (field) X1/ID2-GND (h6) Switch for remote cool/heat selection or
dual setpoint
S10L X1/ID1-GND (fl) Flow switch
Digital out-
put
— K1M X2C1/2-NO1 — Compressor 1 contactor
K2M X2C1/2-NO2 — Compressor 2 contactor
K1P (field) X2C3/4-NO3 — Pump contactor
Y1R/Y2R X2C3/4-NO3 — Reversing valve
H1P (field) X2C5-NO5 — Indication lamp alarm
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