Daikin EUWL KZW1 Series Service Manual page 92

Malfunction Indications and Safeties Overview
2.3 Safeties Overview
1
Safety devices
Alarm
description
Flow switch or
pump contact
Reverse phase
protector
3 3
High-pressure
switch
Low-pressure
switch
4
Outlet water
temp. too low
(freeze-up
protection)
Discharge ther-
5
mal protector
Overcurrent
relay
NTC probe of
the inlet water
temperature
evaporator
NTC probe of
the outlet water
temperature
evaporator
NTC probe of
the inlet water
temperature
condenser
EEPROM on
the controller
PCB
3–10
The table below contains an overview of the safety devices.
Alarm
Activation
indication
No flow for 5 s or no sufficient flow
fl
during a period of 15 s after pump
start.
Imbalance or reversed or no power
fl h1
supply
Discharge pressure
h1
> 30.9 bar
Low-pressure ON
l1
■
Standard: 2.0 bar ± 0.3
■ ZL/ZH: 1.5 bar ± 0.3
Outlet water temp.
a1
■ temp. < 2.5°C
■
temp. < -11.5 °C
■ temp. < -6.5 °C
Compressor discharge temp.
h1
> 135°C
h1
Overcurrent
Probe is defective
e1
Probe is defective
e2
Probe is defective
e3
EEPROM is defective
ee ep
(1)
: An overview of the fuses and overcurrent relays is given in "Checking the Power Supply and Fuses"
on page 3–17.
Reset
Manual software
reset
Correct phase
sequence, switch
power back ON
Manual software
reset
Manual software
reset
Manual software
reset
Standard
ZL option
ZH option
Manual software
reset and temp.
< 115°C
(1) Manual software
reset
Automatic reset
Automatic reset
Automatic reset
Automatic reset
ESIE-0303
Wiring code Device
S10L, S11L Contact closed
on flow
R1P, K4A Contact
ON/OFF
S1PH Switch ON/OFF
S4LP Switch ON/OFF
R4T NTC sensor
Q1D Bimetal
ON/OFF
K4S Bimetal
ON/OFF
R3T NTC sensor
R4T NTC sensor
R5T NTC sensor
— Controller
Part 3 – Troubleshooting