Overview of Inputs and Outputs ESIE98–06A
3–6 Part 3 – Troubleshooting
3
1
3
4
5
Defrost PCB The following table shows the defrost PCB wiring. It describes the relation between the wiring diagram
symbols and the wiring connections for chiller types EUWY15-30HC(Z).
Refer to ‘Defrost Principle (only for EUWY5-30HB/C(Z))’ on page 2-7 for more information about the
defrost principle. For the location of the defrost PCB on the switch box and the wiring diagram, refer
to ‘Defrost Circuit Control’ on page 2-9.
Type Detail
Wiring diagram
symbol
Wiring connection
terminal
Description
analog input sensor R11T S13DF/CN1 sensor for coil temperature measurement circuit 1
R12T S13DF/CN2 sensor for air temperature measurement circuit 1
R21T S14DF/CN1 sensor for coil temperature measurement circuit 2
R22T S14DF/CN2 sensor for air temperature measurement circuit 2
R31 S15DF/CN1 sensor for coil temperature measurement circuit 3
R32 S15DF/CN2 sensor for air temperature measurement circuit 3
digital output contacts K6A S13DF/T1-T2 contactor for defrost circuit 1
K7A S14DF/T1-T2 contactor for defrost circuit 2
K8A S15DF/T1-T2 contactor for defrost circuit 3
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