9-4-2.Outdoor Unit Failure Detection - Toshiba HWS-803XWHM3-E Service Manual

9-4-2. Outdoor Unit Failure Detection
Diagnosis procedure for each check code
• One check code may indicate multiple symptoms. In such a case, see the LED indication on the outdoor board
to narrow down the check details.
• The handy remote controller displays a check code only when the same failure repeatedly occurs while the LED
on the outdoor board indicates an error even if it occurs only once. This may cause indication inconsistency
between the remote controller and LED.
Outdoor board LED indication method
Dip switch setting
• Setting 1 only of SW803 to ON indicates the latest failure.
Because the error history is recorded, you can see the detail
even after the power is once turned off. (Not including outside
air temperature sensor (TO) failure)
• After check work is done or when outside air temperature
sensor (TO) failure is detected, set all the SW803 switches to
OFF.
(An abnormality now is indicated.)
Indication switching
• One or more LEDs of D800 through D804 lit yellow indicates
that a failure occurred. <Indication 1>
• With the status above, pressing the SW800 button for one
second causes the yellow LED to blink. <Indication 2>
• Pressing again SW800 for one second or longer returns to
<Indication 1>.
• The combination of <Indication 1> and <Indication 2> can
determine what kind of abnormality.
Outdoor LED
Check code
indication
[H01] <Indication 1> <Indication 2>
(No specific description indicates outdoor unit parts.)
[Compressor fails]
Power voltage is normal.
(AC220-230 V±10 %: single phase type).
(AC380-400 V±10 %: 3 phase type).
Wiring connection is normal.
Compressor lead (Board side, compressor
side reactor lead, power lead)
Abnormally over loaded
Check outdoor control board
If defective, replace it
109
<Latest abnormality>
SW803 1 only is ON
<Indication 1>
(Normal) (Abnormality occurs)(Press SW800)
D800 (yellow)
D801 (yellow)
D802 (yellow)
D803 (yellow)
D804 (yellow)
D805 (green)
(Example of outlet temperature sensor failure)
Off
Check and Action procedure
PC-Board
803H-E(MCC-1571)
1103 to 1403H-E (MCC-1571)
1103 to 1603H8(R)-E (MCC 1596)
<Abnormality now>
SW803 All OFF (Initial status)
<Indication 2>
Light Blink
Improve power line
Check and correct wiring
connection
Deal with or remove causes