Daikin EWYQ180DAYN [419/524] Overview of network safeties

Daikin EWYQ150DAYN [419/524] Overview of network safeties
ESIE06-05 Overview of Fault Indications and Safeties
Part 3 – Troubleshooting 3–19
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1.6 Overview of Network Safeties
Network Safety
Overview
Network Safety OC9 INL SENSOR ERR
Purpose
Detect if sensor is broken or not good connected (open OR short circuit).
OU4: PCB COMM. PROBLEM
Purpose
Indicate if there is no communication with the communication PCB
NETWORK SAFETY 0C9:INL SENSOR ERR
0U4:PCB COMM.PROBLEM
0U4:SW VERSION ERR
Symptom: Sensor error
POSSIBLE CAUSES CORRECTIVE ACTION CONSEQUENCE
The sensor is broken or not
correctly wired (open or short
circuit).
Check if the wiring is accord-
ing to the wiring diagram.
If value is too high (above
range) ==> display “+ER”.
If value is too low (below
range) ==> display “-ER”.
RESET : Possible to reset (manual) if the value is within range.
Symptom: The NETWORK SAFETY alarm message shows PCB COMM. PROBLEM
POSSIBLE CAUSES CORRECTIVE ACTION CONSEQUENCE
The unit cannot be found by
the DICN system (EKACPG)
Check if the wiring is accord-
ing to the wiring diagram.
Make sure all the units in
the DICN system are
powered up.
Make sure that the correct
number of slave units is
defined in the master unit.
Make sure that the correct
unit address setting is
defined in each unit (refer
to the installation manual).
RESET: After finding the cause and communication is restored, error can be reset on the control-
ler.

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