Appendix - Toshiba RAV-SP1104AT-A Installation Manual

No. Cause
15 MCU-MCU communication error
16 Discharge temperature error
Abnormal power (open phase detected or
17
abnormal voltage)
18 Heat sink overheat
19 Gas leak detected
20 4-way valve reverse error
21 High pressure release operation
22 Outdoor fan motor error
23 Compressor driver short-circuit protection
Position detection circuit error in one-line
24
display
* The LEDs and DIP
SW801
switches are located
on the lower left of
the P.C. board of the
outdoor unit.
SW804
EN-25
Display mode 1 Display mode 2
D800 D801 D802 D803 D804 D800 D801 D802
( :OFF
SW800
Enlarged view of
LED
D800
D801
D800
D802
D803
D801
D804
D805
D802
SW803
D803
D804
D805
SW802
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14

APPENDIX

D803 D804
Work instructions:
The existing R22 and R407C piping can be reused for
our digital inverter R410A product installations.
NOTE
Confirming the existence of scratches or dents on the
existing pipes and confirming the reliability of the pipe
strength are conventionally referred to the local site.
If the specified conditions can be cleared, it is
possible to update existing R22 and R407C pipes to
those for R410A models.
Basic conditions needed to reuse existing
:ON :Flashing)
pipes
Check and observe the presence of three conditions in
the refrigerant piping works.
1. Dry (There is no moisture inside of the pipes.)
2. Clean (There is no dust inside of the pipes.)
LEDs
3. Tight (There are no refrigerant leaks.)
Restrictions for use of existing pipes
In the following cases, the existing pipes should not
be reused as they are. Clean the existing pipes or
exchange them with new pipes.
1. When a scratch or dent is heavy, be sure to use new
pipes for the refrigerant piping works.
2. When the existing pipe thickness is thinner than the
specified "Pipe diameter and thickness," be sure to
use new pipes for the refrigerant piping works.
• The operating pressure of R410A is high (1.6
times that of R22 and R407C). If there is a
scratch or dent on the pipe or a thinner pipe is
used, the pressure strength may be inadequate,
which may cause the pipe to break in the worst
case.
* Pipe diameter and thickness (mm)
Pipe outer
Ø6.4 Ø9.5 Ø12.7 Ø15.9 Ø19.0
diameter
R410A
Thickness 0.8 0.8 0.8 1.0
R22
(R407C)
• In case the pipe diameter is Ø12.7 mm or less
and the thickness is less than 0.7 mm, be sure to
use new pipes for the refrigerant piping works.
3. When the outdoor unit was left with the pipes
disconnected, or the gas leaked from the pipes and
the pipes were not repaired and refilled.
• There is the possibility of rain water or air,
including moisture, entering the pipe.
4. When refrigerant cannot be recovered using a
refrigerant recovery unit.
• There is the possibility that a large quantity of dirty
oil or moisture remains inside the pipes.
5. When a commercially available dryer is attached to
the existing pipes.
• There is the possibility that copper green rust has
been generated.
6. When the existing air conditioner is removed after
refrigerant has been recovered.
Check if the oil is judged to be clearly different from
normal oil.
• The refrigerator oil is copper rust green in color:
There is the possibility that moisture has mixed
with the oil and rust has been generated inside
the pipe.
• There is discolored oil, a large quantity of residue,
or a bad smell.
• A large quantity of shiny metal dust or other wear
residue can be seen in the refrigerant oil.
7. When the air conditioner has a history of the
compressor failing and being replaced.
• When discolored oil, a large quantity of residue,
shiny metal dust, or other wear residue or mixture
of foreign matter is observed, trouble will occur.
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1.0