Dedicated Lcd Remote Controller - Daikin VAM 150FAVE Service Manual

Troubleshooting

1.15 Dedicated LCD Remote Controller

When no indication is displayed on remote controller
Error Detection Check to see if remote controller displays indication.
Method
Error Generating
Conditions
Possible Causes
Troubleshooting
Check 1, 2, 3 : Refer to page 49
48
Disconnect remote
controller cable from
both main unit
terminal board and
remote controller
terminal board.
Using tester, check
continuity between
two wires in cable.
Is
measured
NO
value ∞ MΩ
(infinity)?
Check 1
YES
With remote
controller cable
disconnected from
main unit PCB, check
voltage between P1
and P2 on main unit
terminal board.
Is
measured
NO
value approx. 16
VDC?
Check 2
YES
Connect remote
controller cable to
main unit PCB, and
disconnect remote
controller. Check
voltage at the end of
cable on remote
control side.
Is
measured
NO
value approx. 16
VDC?
Check 3
YES
There may be shorting in
remote controller cable.
Main unit PCB may be
faulty.
There may be open circuit
in remote controller cable.
Remote control PCB may
be faulty.
(HF014)
Troubleshooting
SiE71-202