Troubleshooting Si33-105
188 Troubleshooting R407C PLUS Series Heat Recovery System
3.32 Excessive Number of Indoor Units
Remote
Controller
Display
UA
Supposed
Causes
!
Excess of connected indoor units
!
Defect of outdoor unit PC board (A1P)
Troubleshooting
The number of indoor units that can be connected to a single outdoor unit system depends on
the type of outdoor unit.
"
RSEYP16~20KJY1 ··· 20 units
RSEYP24~30KJY1 ··· 32 units
(VF059)
The total
of indoor units
displaying "UA" and indoor
units connected to the same
refrigerant system is
20 or 32 units or
less.
H
Replace outdoor unit PC board
(A1P).
Normal
NO
NO
There are too many indoor units
within the same refrigerant
system.
Push and hold the RESET button
on the outdoor unit PC board for 5
seconds.
YES
YES
Does a malfunction occur?
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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