Toshiba RAV-SM304SDT-TR Service Manual page 101

10-2-6. Diagnostic Procedure for Each Check Code (Outdoor Unit)
1) This section describes the diagnostic method for each check code displayed on the wired remote controller.
2) In some cases, a check code indicates multiple symptoms.
In this case, confirm LED display on the outdoor P.C. board to narrow the contents to be confirmed.
3) The check code on the remote controller is displayed only when the same error occurred continuously by
multiple times while LED of the outdoor P.C. board displays even an error which occurred once.
Therefore the display on the remote controller may differ from that of LED.
How to check LED display on outdoor P.C. board
Dip switch setup
• When turning on 1) only of SW803, the latest error
is displayed. As the memory is stored, it can be
confirmed even if the power supply is turned off
once. (excluding outside temp. sensor (TO) error)
• When the work finished or the outdoor temp.
sensor (TO) error was found, turn off all of SW803.
(The error which occurs at present is displayed.)
Display selection
• When an error happens, some of yellow LED
(D800 to D804) turn on. <Display 1>
• If pushing the button switch SW800 for 1 second
under the above condition, the yellow LED is
displayed with flashing. <Display 2>
• When pushing SW800 for 1 second again, the
status returns to <Display 1>.
• The error contents can be confirmed by combining
<Display 1> and <Display 2>.
Check Outdoor
code LED display
—
[E04]
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[Indoor/Outdoor communication error]
Is setting of group address
of remote controller correct?
YES
Are inner wiring of indoor unit and
inter-unit wires (1, 2, 3) correct?
YES
Are CN04 connection and wiring
of terminal blocks (1, 2, 3) correct?
YES
After turning off the power supply,
turn on it again.
Does D502 (Orange LED) flash?
YES
– 101 –
<Latest error display>
Only 1) of SW803 is ON.
<Error display, which occurs at present>
All SW803 are OFF. (Initial status)
<Display 1>
(No error) (Error occurred)
D800 (Yellow)
D801 (Yellow)
D802 (Yellow)
D803 (Yellow)
D804 (Yellow)
D805 (Green)
(Example of discharge temp. sensor error)
: Go off,
NO
NO
NO
NO
<In case of SP80>
<Display 2>
(Push SW800)
: Go on, : Flash
Check Item code [14].
Correct wiring
and inter-unit cable.
Correct wiring of connectors
and terminal blocks.
Check indoor P.C. board.
Defect → Replace
Check outdoor P.C. board.
Defect → Replace