Troubleshooting By Led Indications; Troubleshooting By Led On The Indoor Unit; Troubleshooting By Led On Outdoor Unit Pcb - Daikin ZQG71~140L7V1B Service Manual

ESIE12-06

3. Troubleshooting by LED Indications

3.1

Troubleshooting by LED on the Indoor Unit

Foreword
Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal)
k : LED on / h : LED off / l : LED blinks
Micro-computer
Normal Monitor
HAP (LED-A)
l
l
k
h
Note:
1. When the INSPECTION/TEST button of remote controller is pushed, INSPECTION display blinks entering
INSPECTION mode.
2. In the INSPECTION mode, when the ON/OFF button is pushed and held for 5 seconds or more, the
aforementioned error history display is OFF. In this case, after the error code blinks 2 times, the code
display turns to "00" (=Normal) and the unit No. turns to "0". The INSPECTION mode automatically
switches to the normal mode (set temperature display).
3. Operation halts due to error depending on the model or condition.
4. Troubleshoot by turning OFF the power supply for a minimum of 5 seconds, turning it back ON, and then
rechecking the LED display.
3.2

Troubleshooting by LED on Outdoor Unit PCB

The following diagnosis can be conducted by turning ON the power switch and checking the LED indication
on PCB (A1P) of the outdoor unit.
k : LED on / h : LED off / l : LED blinks
LED detection
HAP
(Green) (Red)
l
k
h
l
Note:
1. Turn OFF the power supply, and turn it ON again after 5 seconds or more. Check the error condition, and
diagnose the problem.
2. Turn OFF the power supply. After 5 seconds or more, disconnect the connection wire (2). Then turn ON
the power supply. If the HAP on the outdoor unit PCB flashes after about 10 seconds, the indoor unit PCB
is faulty.
3. Also check for open phase.
Remark:
The error detection monitor continues to indication the previously generated error until the power supply is
turned OFF.
Be sure to turn OFF the power supply after inspection.
Service Diagnosis
Indoor unit normal  Outdoor unit troubleshooting
Incorrect transmission wiring between indoor and outdoor unit
If outdoor unit's LED-A is OFF, proceed outdoor unit's troubleshooting. If outdoor unit's
LED-A blinks, defective wiring or indoor or outdoor unit PCB assy.
Defective indoor unit PCB assy
Defective power supply or defective PCB assy or broken transmission wire between indoor
and outdoor unit.
H1P
h Normal
— Defective outdoor unit PCB (Note 1)
— Power supply abnormality, or defective outdoor unit PCB (Note 2)
k Activation of protection device (Note 3)

Troubleshooting by LED Indications

Contents/Processing
Description
129