IVT AY-XP12FR-N Service Manual page 39

Malfunction indications due to erroneous wiring during air conditioner installation
Inter-unit wiring error mode
1
1 1
Indoor Outdoor
N N
unit
2 2
2
1 1
Indoor Outdoor
N N
unit
2 2
3
1 1
Indoor Outdoor
N N
unit
2 2
4
1 1
Indoor Outdoor
N N
unit
2 2
5
1 1
Indoor Outdoor
N N
unit
2 2
Indoor unit relay
Malfunction diagnosis display
unit
Indoor unit relay
Malfunction diagnosis display
unit
Indoor unit relay
Malfunction diagnosis display
unit
Indoor unit relay
Malfunction diagnosis display
unit
Indoor unit relay
Malfunction diagnosis display
unit
Symptom
Turns On momentarily, then turns Off.
"18-1"
Relays turns Off after about 30 minutes.
None
(Displays "18-0" when malfunction code is called out.)
Relays turns Off after about 30 minutes.
None
(Displays "18-0" when malfunction code is called out.)
Turns On momentarily, then turns Off.
"18-1"
Turns On momentarily, then turns Off.
"18-1"
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AYXP12FRN