Daikin EUWA/Y5-30HB/C(Z) - Safeties Overview

Overview of Fault Indications and Safeties ESIE98–06A
3–12 Part 3 – Troubleshooting
3
1
3
4
5
2.4 Safeties Overview
Safety devices
1
: An overview of the fuses and overcurrent relays is given in ‘Checking the Power Supply and Fuses’
on page 3-18.
Alarm
description
Alarm indication Activation Reset
Wiring
code
Device
EUWA/Y5-10HB(
Z)
EUWA/Y15-30HC(
Z)
flow switch or
pump contact
fl flow switch activated
or not
no flow for 5 sec-
onds
manual software
reset
S10L,
S11L
contact
closed on
flow
reverse phase
protector
fl+h1 reverse phase pro-
tection active or not
imbalance or
reversed or no
power supply
correct faze
sequence, switch
power back on
R1P,
K4A
contact on/off
high pressure
switch
h1 safety 1/2/3 active discharge pres-
sure > 28 bar
manual software
reset
S1PH,
S2PH,
S3PH
switch on/off
contact
leaving evaporat-
ing temperature
too low (hard
freeze-up
protection)
l1 safety 1/2/3 active leaving evaporator
temperature <
-4 °C
manual software
reset
S16T,
S17T
switch on/off
outlet water tem-
perature too low
(soft freeze-up
protection)
a1 safety 1/2/3 active outlet water tem-
perature < 4 °C
manual software
reset
R4T,
R5T,
R6T
NTC sensor
discharge ther-
mal protector
h1 safety 1/2/3 active high compressor
discharge temper-
ature > 135 °C
manual software
reset and temper-
ature < 115 °C
Q1D,
Q2D,
Q3D
bimetal on/off
overcurrent relay h1 safety 1/2/3 active
overcurrent
1
h1: manual soft-
ware reset
K4S,
K5S,
K6S
bimetal on/off