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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.
Check code
Outdoor LED
indication
Check and Action procedure
(No specific description indicates outdoor unit parts.)
[H01]
<Indication 1> <Indication 2>
[Compressor fails]
1
ON
234
<Latest abnormality>
SW803 1 only is ON
1
ON
234
<Abnormality now>
SW803 All OFF (Initial status)
D800 (yellow)
D801 (yellow)
D802 (yellow)
D803 (yellow)
D804 (yellow)
D805 (green)
Off Light Blink
(Normal) (Abnormality occurs)(Press SW800)
(Example of outlet temperature sensor failure)
<Indication 1> <Indication 2>
Power voltage is normal.
230ACV
±
23V
Improve power line
Check outdoor control board
If defective, replace it
No
Yes
Abnormally over loaded
Deal with or remove causes
Yes
No
Wiring connection is normal.
Compressor lead (Board side, compressor
side reactor lead, power lead)
Check and correct wiring
connection
No
Yes
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 91 Monday, October 5, 2009 2:09 PM