Toshiba RAV-SP1104AT8-E1 Service Manual page 95

No. Cause
1 Normal
2 Discharge (TD) sensor error
3 Heat exchanger (TE) sensor error
4 Heat exchanger (TL) sensor error
5 Outside air temperature (TO) sensor error
6 Suction (TS) sensor error
7 Heat sink (TH) sensor error
8 Outdoor temperature sensor (TE/TS) connection error
9 Outdoor EEPROM error
10 Compressor breakdown
11 Compressor lock
12 Current detection circuit error
13 Thermostat for compressor activated
14 Model data not set (on the service P.C. board)
15 MCU-MCU communication error
16 Discharge temperature error
17 Abnormal power (open phase detected or 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
24 Position detection circuit error in one-line display
25 High pressure SW error
* The LEDs and DIP switches are
located on the lower left of the P.C.
board of the outdoor unit.
EN-141
Display mode 1 Display mode 2
D800 D801 D802 D803 D804 D800 D801 D802 D803 D804
( : OFF : ON
ON ON
1 2 3 4 1 2 3 4
Enlarged view
SW804 SW805
of LEDs
ON ON
1 2 3 4 1 2 3 4
SW802 SW803 SW800 SW801 SW806
LED
D805
D804
D803
D802
D801
D800
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15
APPENDIX
Work instructions
The existing R22 and R407C piping can be reused for
our digital inverter R410A product installations.
WARNING
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
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.)
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
: Flashing)
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
D805
times that of R22 and R407C). If there is a scratch
D804
or dent on the pipe or a thinner pipe is used, the
D803
pressure strength may be inadequate, which may
D802
cause the pipe to break in the worst case.
D801
D800
* Pipe diameter and thickness (mm)
Pipe outer diameter Ø6.4 Ø9.5 Ø12.7 Ø15.9 Ø19.0
R410A
Thickness 0.8 0.8 0.8 1.0 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.
8. When temporary installation and removal of the air
conditioner are repeated such as when leased etc.
EN-142