Daikin FTK35JAVET User Manual

Troubleshooting - Outdoor Unit Related Si18-201
290 Service Diagnosis
3.3.27 Overvoltage, Low Voltage
Outdoor Unit
Indication
U2
Method of
Malfunction
Detection
Power supply system error is detected using the voltage of inverter DC unit.
Malfunction
Decision
Conditions
When, after starting the compressor, the voltage reached to below 210V over 450V before it
exceeded 320V, or to below 260V or over 450V after it exceeded 320V once.
"
When a power supply system error is generated 4 times, the system shuts down.
(The 4-time counter resets itself when no outdoor unit abnormality occurs within 60-minute
cumulative time after the error generation.)
Supposed
Causes
"
Electrolytic capacitor malfunction
"
PAM module malfunction
"
Faulty power transistor
"
Disconnection·Faulty connection of internal wiring
"
Faulty reactor
"
Faulty PC board
"
Instantaneous power failure
"
Mismatching with power supply of feedback control system
Troubleshooting
Check No.5
Refer to P.302
Check No.12
Refer to P.307
Check No.13
Refer to P.308
YES
Could be causes on site.
Replace if any abnormality.
Replace control PC board,
filter PC board if the voltage
is not within the range.
Replace active module.
As the system will not shut
down, use as it is.
Is the input
voltage within a range of
220-240V±10%?
(MF046)
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check No. 12
Electrolytic capacitor
capacity check
OK
Check No. 13
Voltage check when starting
the compressor
Check No. 5
Main circuit wiring
connection check
Measure the voltage at both
ends of electrolytic capacitor
while the compressor is
operating.
YES
Does the
voltage reach to
approximately 370V within
approximately 2 seconds
after starting the
compressor?
NO
Do a long-term observation
on power supply voltage.
Supposed causes
n
Instantaneous power failure

Daikin FTK35JAVET Specifications

General

Brand	Daikin
Model	FTK35JAVET
Category	Heat Pump
Language	English