Daikin 10 - Page 99

96
7
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
1
Applicable Models
①AKZ**A-H
②Models other than AKZ**A-H
with optional safety device
mounted
2
Methods of Malfunction Detection
①AKZ**A-H
Detect with the boil-dry
prevention switch (S5P).
②Models other than AKZ**A-H
Detect with the optional
safety devices.
3
Malfunction Decision Conditions
Class Conditions
50–53
① AKZ14A–43A-H
Actuating (open)
pressure: 0.02MPa or
less
② AKZ56A, 90A-H
Actuating (open) flow
rate: 15L/min or less
③ Models other than
AKZ**A-H Actuating
(open) pressure of the
optional safety devices.
4
Supposed Causes
1Faulty optional device
1Faulty boil-dry prevention
switch (S5P)
1Faulty control board (A1P)
Control panel display
EJ
Actuation of boil-dry Prevention Switch or Optional Safety
devices
Replace the boil-dry
prevention switch (S5P).
Replace the control
board (A1P).
(See page 122/137)
YES
The
malfunction code “EJ”
is displayed.
NO
Check the optional safety
devices for the function
and then rectify if required.
NO
YES
Is it a heater
equipped model?
Disconnect the signal wire from the terminals
12 - 13 of the terminal block (X2M) to operate the unit.
(If “EJ” is displayed, the system is normal.)
YES
Replace the unit.
Replace the oil pump
(M1P).
(See page 127/142)
The
boil-dry prevention switch
has no continuity.
NO
NO
The oil pump is
in operation.
YES
00_PB00540A_M10.indb 96 2023/08/09 12:59:06