Daikin 10 - Page 110

●Troubleshooting
107
7
Troubleshooting
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
1
Applicable Models
AKZ**A (All series)
2
Methods of Malfunction Detection
Detect each phase in power
supply phase detection circuit.
3
Malfunction Decision Conditions
Class Conditions
10
When reverse phase is detected in
the power supply circuit immediately
after the power is turned on.
11
When L1 is detected in the power supply circuit
immediately after the power is turned on.
12
When L2 is detected in the power supply circuit
immediately after the power is turned on.
13
When L3 is detected in the power supply circuit
immediately after the power is turned on.
14
When single-phase open phase of
L1, L2, or L3 is detected during use.
15
When two-phase open phase of L1,
L2, or L3 is detected during use.
* If the power supply voltage is
high or low, the conditions for
classifications 11 and 12 may
be reversed.
4
Supposed Causes
1Reverse phase in power
supply line
1Open phase in power supply
line
1Faulty noise filter board
(A3P)
1Overloaded operation of oil
pump
1Short circuit or poor
insulation of oil pump coil
1Noises in power supply line
1Faulty control board (A1P)
Control panel display
UI
Reverse Phase/Open Phase of Power Supply (Broken Wire
in Fuse)
External factors (e.g.
noises) other then
failure are supposed.
NO
Is
“ U I ” displayed
on the monitor mode
screen?
YES
Exchange wires of
power supply line.
NO
Are the phases
of power supply
proper?
YES
Connect all three
phases.
NO
Are L1/L2/L3
connected, or is the power
supply wiring connected from the terminal
block to the noise filter
board (A3P)?
YES
YES
Improve power supply
equipment.
NO
Is the power supply
voltage for each phase normal
(380–415V±10%)?
Turn OFF the power
supply and then ON again.
Replace the noise filter
board (A3P) and oil pump
(M1P).
(Oil pump (M1P): see
page 127/142)
NO
Replace the control
board (A1P).
(See page 122/137)
YES
Any of wire in
the fuses (FU511 to FU513)
is disconnected.
YES
Insulation of pump
coil is poor.
Replace the noise filter
board (A3P).
(See page 123/138)
NO
Check the alarm code in service monitor mode.
U1.10, U1.11
U1.12, U1.13
U1.14, U1.15
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