Service manual

Troubleshooting by Indication on the Remote Controller SiUS28-902_a
85 Troubleshooting
3. Troubleshooting by Indication on the Remote
Controller
3.1 “A0” Indoor Unit: Error of External Protection Device
Remote
Controller
Display
A0
Applicable
Models
All indoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
 Actuation of external protection device
 Improper field set
 Defect of indoor unit P.C.B.
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector or parts could be damaged.
Indoor unit P.C.B. replacement.
Actuation of external protection
device.
Change the second code No. to
"01" or "02" .
External
protection device is
connected to terminals T1
and T2 of the indoor
unit terminal
block.
ON/OFF
input from
outside (mode No. 12,
first code No. 1) has been
set to external protection
device input (second
code No. 03)
by remote
controller.
YES
NO
NO
YES