York CIDH018B21S, Service Manual

Page: 35 / 186

SM-18001-rev.1
3-13
TROUBLESHOOTING
Indoor Unit PCB Outdoor Unit PCB
Normal Normal
Abnormality of Inlet Air Temp. Thermistor Abnormality of Transmission of Outdoor Unit
Abnormality of Outlet Air Temp. Thermistor ITO Input Failure
Abnormality of Liquid Pipe Temp. Thermistor PSH Input Failure
Abnormality of Remote Thermistor Abnormality of Protection Signal Detection Circuit
Abnormality of Gas Pipe Temp. Thermistor Abnormality of Phase Detection
Abnormality of Transmission of Central Station Abnormality of Transmission of Inverter
Abnormality of EEPROM Abnormality of High Pressure Sensor
Zero Cross Input Failure Abnormality of Comp. Discharge Gas Temp. Thermistor
Abnormality of Transmission of I.U. during Check Abnormality of Low Pressure Sensor
Abnormality of Evaporating Temp. Thermistor at Heating
Abnormality of Ambient Air Temp. Thermistor
Results of Check Table
(1) Press and hold “Menu” and “ECO”
simultaneously for three seconds during the
normal mode.
Check Menu is displayed.
Check Menu
Self Checking
02
/
02
I. U./O. U. PCB Check
Entr Sel.
Rtrn Back
OK
(2) Select “I.U./O.U. PCB Check” from the Check
Menu and press “OK”.
(3) Select the indoor unit to be set by pressing
“ ” and press “OK”. This screen is NOT
displayed when there is only one indoor unit
connected with the wired controller. In this case,
(4) below is displayed.
I.U./O.U. PCB Check
01-01 02-01 03-01 04-01
04-02
04-03
04-04
03-02
03-03
03-04 01-02 02-02
02-03
02-04
01-03
01-04
Sel.
OK Entr
Rtrn
Back
(4) The indoor unit PCB and the outdoor unit PCB
checks are started.
* If “Menu“ is pressed during the check, the
check is canceled and the screen returns to (2).
* If “Back/Help” is pressed during the check, the
check is canceled and the screen returns to (3)
above.
Check 1: Checking
Check 2: Checking
Check 3: Checking
I.U./O.U. PCB: Check 01-01
(5) After completing the check, the results of the
PCB check are indicated. Press “Back/Help”
and return to (3) above.
Check 1: 00
Check 2: 00
Check 3: 00
I.U./O.U. PCB: Check 01-01
(3) I.U./O.U. PCB Check