Over Voltage Protection / Low Voltage Protection - Daikin CTXU25G2V1B Service Manual
Inverter multi system with humidifying g-series
Hide thumbs
Also See for CTXU25G2V1B:
- Service manual (274 pages) ,
- Operation manual (37 pages) ,
- Installation manual (18 pages)
Table of Contents
SiBE12-908
2.32
Over Voltage Protection
U2
Remote
Controller Display
Outdoor Unit LED
A5
Display
Method of
Detect an abnormal increase or drop of voltage by the detection circuit or DC voltage detection
circuit.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
55 ( - )
When an overcurrent signal is sent to the microcomputer from the overcurrent detection
circuit, or the voltage detected by DC voltage detection circuit is less than 150 V and that
voltage continues for about 0.1 sec.
The machine shuts down if the fault conditions occurs 255 times
Fault counter is reset when the machine continuously runs for 60 min. without fault.
Abnormal supply voltage, momentary power failure
Defective overcurrent detector or defective DC voltage detection circuit
Failure in PAM controlled parts
Short circuit inside the fan motor winding.
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check the supply voltage.
Supply voltage as
specified?
YES
Rotate fan by hand.
Does fan rotate
smoothly?
YES
Turn on the power
again. System
restarted?
NO
Repeat a
couple of times.
/
Low Voltage Protection
NO
NO
(Precaution before turning on the power again)
Make sure the power has been off for
at least 30 seconds.
YES
Disturbance factors
∗ Noise ∗ Power supply distortion
Troubleshooting
Correct the power supply.
Replace fan motor and
outdoor unit PCB.
Check for such factors for a
long term.
∗ Try to get restarted a
couple of times.
Replace the outdoor unit
PCB.
(R9451)
149
- Quick Links:
- Freeze-Up Protection Control
Hide quick links:
Chapters
Table of Contents
