Toshiba RAV-SM2244AT8-A Service Manual page 60

Check Outdoor
code LED display
[P22] <Display 1> <Display 2>
¡
¡
l
¡
¡
¡
[P26] <Display 1> <Display 2>
¡
¡
l
¡
¡
¡
[P29] <Display 1> <Display 2>
¡
¡
l
¡
¡
¡
— <Display 1> <Display 2>
No code
¡
¡
l
¡
¡
l
(Item without special mention Indicates part of outdoor unit.)
[Fan system error]
¡
¥
Is there no problem on power supply voltage?
l
¥
¥
l
Does the fan rotate without trouble when rotating
shaft of fan motor with hands during power-OFF?
Is there no problem on coil resistance of fan motor?
Between red and white lead wire
Between white and black lead wire : 12 to 20Ω
Between black and red lead wire
Single operation check for outdoor fan
1) Set SW804 of Dip switch as the following figure and then push SW801 for
approx. 1 second to check single operation of outdoor fan. Use this method to
check which fan, upper or lower fan, has a trouble.
• When pushing SW801 for 1 second again or 2 minutes passed, the fan stops.
2) After check, turn off all Dip switch
SW804.
[Short-circuit of compressor drive element]
¡
¥
Is there no problem on connection
¥
of compressor lead or reactor?
l
(Check referring to Wiring diagram.)
¥
YES
l
The same error does not occur in
operation without compressor lead.
YES
[Position detection circuit error]
¡
¥
¥
Check outdoor P.C. board (MCC-1596).
¥
l
¥
[Other error] Compressor disorder due to sudden change of load, etc.
¡
∗ Although the display of outdoor LED outputs, the unit automatically restarts
and error is not determined.
¥
∗ LED display also may output due to negative phase of compressor or wire
¥
coming-off.
¥
¥
¥
Check and troubleshooting
(342 to 457V)
YES
: 12 to 20Ω
: 12 to 20Ω
NO
Replace fan motor.
NO
NO
Defect → Replace
– 60 –
NO
Check wiring construction.
Ask repair of power supply.
YES
Check outdoor P .C. board (MCC-1597).
Defect → Replace
Outdoor fan single operation
SW804 SW801
ON
Push
1 2 3 4
Correct wiring.
Replace outdoor P.C. board.
Check compressor. (Rear short, etc.)
Defect → Replace