Malfunction Of Transmission (Between Indoor And Outdoor Unit); Malfunction Of Transmission - Daikin SkyAir Super Inverter 70 D Series Service Manual

SiE25-110
6.37 Malfunction of Transmission (Between Indoor and
Outdoor Unit)
U4
Remote
Controller
Display
LED Display A
Applicable
RZP71~140D
Models
Method of
Microcomputer checks if transmission between indoor and outdoor units is normal.
Malfunction
Detection
Malfunction When transmission is not carried out normally for a certain amount of time
Decision
Conditions
Supposed
Causes
Troubleshooting 1 Diagnosis of incorrect or broken/disconnected wiring
If the LEDs on the indoor unit PC board are off, it indicates that the transmission wiring between
indoor and outdoor units may be incorrect or broken/disconnected.
Troubleshooting
1 2 3 4
— — — — —
Wiring indoor-outdoor transmission wire is incorrect.
Failure of indoor unit PC board
Failure of outdoor unit PC board
Outside cause (noise, etc.)
Power supply -open phase
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is H1P blinking?
YES
Check of
indoor unit
microcom-
puter normal
H1P
Is H2P blinking?
YES
Check of
indoor unit
transmission
malfunction
H2P
To outdoor unit (next page)
Troubleshooting by Remote Controller Display / LED Display
NO (ON or OFF)
Turn the power supply off
once and then back on.
Is H1P blinking?
YES
NO
Is H2P on?
NO(OFF)
Does outdoor
NO
unit microcomputer normal
H1P blink?
YES
Is
transmission
YES
wire between indoor and
outdoor unit wired
correctly?
NO
Failure of indoor unit PC
board or malfunction of
power supply system
Resets normally.
Could be outside cause
(noise, etc.).
YES
Failure of indoor unit PC
board.
NO
Wire correctly
(S2039)
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