Filter
Top Products
–39–
7) No heating operation works
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
ON/OFF S/W ON
Is the AC220V
(AC 240 V) between connector
(CN-outunit) Pin 1 and Pin 3 of
Main P.C.B
Is the input power AC220V
(AC240V) at COMP magnetic coil
contactor?
Is it heating mode?
Room temp <Set temp?
Is the DC5V
at 14 pin of Micom terminal
Is the DC5V
at 18 pin of Micom terminal
Is the DC12V
at each terminal?
(RY-4way COIL)
Is the
AC220V (AC 240 V) between
connector(4WAY) and CN-outunit Pin 1 of
Main
P. C.B
Is the DC12V at
each terminal?
Replacement RY-4way
Replacement ICO2M
Replacement RY-Comp
Is the AC220V
(AC 240 V) between connector(CN-outunit)
Pin 1 and Pin 3 of Main
P. C.B
Replacement MICOM
Replacement ICO2M
Room temp. < Set temp. Setting
Replacement MICOM
Select the heating operation mode.
Check the COMP magnetic
contactor of outdoor unit.
Check the wiring
connection
Is the unit operating?