Daikin EUWL KZW1 Series, Service Manual

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