Malfunction Of Transmission Between Indoor Units - Daikin VRV Inverter K Series Manual

SI-05C.BOOK Page 151 Monday, November 6, 2000 4:13 PM
SiE-05C

3.28 Malfunction of Transmission Between Indoor Units

U U U U 4 4 4 4
Remote Controller
Display
Supposed Causes
Troubleshooting
Troubleshooting Inverter K Series
Indoor to outdoor,outdoor to outdoor crossover wiring disconnection, short circuit or wrong check
Outdoor unit power supply is OFF
System address doesn't match
Defect of indoor unit PC board
Defect of outdoor unit PC board
Has
the indoor or
outdoor unit PC
board been replaced,
YES
or has the indoor - outdoor or
outdoor - outdoor unit
transmission wiring
been modified?
NO
All
indoor unit
NO
remote controllers of the same
refrigerant system
display "U4."
YES
Reset the power supply.
Outdoor unit PC
NO
board microcomputer monitor
(HAP) blinks.
YES
Operation
NO
ready lamp (H2P) is
blinking.
YES
Wait to lamp goes off.
Is
indoor - outdoor and
NO
outdoor - outdoor unit
transmission wiring
normal?
YES
Push and hold the RESET button
on the outdoor unit PC Board for
5 seconds.
∗ The unit will not operate for
up to 12 minutes.
Is indoor
- outdoor and outdoor - YES
Replace the indoor unit PC Board.
outdoor unit transmission
wiring normal?
NO
Fix the indoor/outdoor unit
transmission wiring.
The voltage
between terminals R
NO
and S of the outdoor unit PC
Supply 220~240 V.
board is 220~240 V
(60Hz) or 220 V
(50 Hz).
YES
The fuse on
NO
the outdoor unit's PC board Replace the fuse.
is burnt.
YES
The secondary
NO
voltage of the transformer is Replace the transformer.
about 30 V. replacement
YES
Replace outdoor unit PC board.
Fix the indoor/outdoor unit
transmission wiring.
Replace the outdoor unit PC
Board.
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Troubleshooting
(VF054)
151