64
3 blinks
4 blinks
LED1
(Green)
LED2
(Red)
1 blink
2 blinks
3 blinks
4 blinks
5 blinks
1 blinks
2 blinks
3 blinks
•Abnormal high discharge temperature(TH4)
From the preceding page.
•Abnormal high pressure (High pressure
switch 63H worked)
•Protection from overheat operation (TH3)
•Compressor's overcurrent (Overload)
•Thermal relay (51C) has been tripped
•Overcurrent has locked the operation of
compressor in start-up.
•Open / short circuit of discharge thermistor (TH4)
•Open / short circuit of liquid pipe thermistor (TH3)
•Open / short circuit of EVA / COND pipe
thermistor (TH6)
•Abnormality of room temperature thermistor
(Indoor unit side: TH1)
•Abnormality of Liquid pipe thermistor
(Indoor unit side:TH2)
•Abnormality of EVA / COND pipe thermistor
(Indoor unit side: TH5)
•Abnormality of drain sensor
(Indoor unit side : (DS))
•Malfunction of drain-up machine
•Abnormality of pipe temperature
1
Check if ball valves are open.
2
Check the continuity of connector (TH4) on outdoor controller
board by using a tester.
1
Check if outdoor unit has a short cycle on its air duct.
2
Check if the connector of TH3 on outdoor controller board is
disconnected.
1
Check if the connectors of TH4, TH3, and TH6 on outdoor
controller board are disconnected.
2
Measure the resistance values of each thermistor
(TH4, TH3, and TH6).
1
Check if the connectors of CN20, CN21, and CN29 on
outdoor controller board are disconnected.
2
Measure the resistance values of each thermistor
(TH1, TH2, and TH5).
3
Check if the unit fills the refrigerant at the same amount as
specified.
1
Check if indoor / outdoor units have a short cycle on their air
ducts.
•Abnormal low pressure (Low pressure
switch 63L worked)
1
Check stop valve.
234
Put the power off and on again to check if F3 is displayed
on restarting. If F3 is displayed, follow the F3 processing
direction.
5
Correct to proper amount of refrigerant.
6
Check linear expansion valve. Refer to 10-6.
2
Check if the connector of 52C (63H) on outdoor controller
board is disconnected.
3
Check if the units get their heat exchanger and filter dirty and
clogged.
4
Measure resistance values among terminals on linear
expansion valve by using a tester.
1
Check if ball valves are open.
2
Measure resistance values among terminals on compressor
by using a tester.
3
Check if outdoor unit has a short cycle on its air duct.
1
Check if the connector of CN31 on outdoor controller board
is disconnected.
2
Measure the resistance value of drain sensor.
3
Measure resistance values among terminals on drain-up
machine by using a tester.
1
Check if the connectors of CN20, CN21, and CN29 on
outdoor controller board are disconnected.
2
Check if ball valves are open.
3
Check if the wirings are correct on the connecting wires of
indoor / outdoor units.
4
Check if the connector of 51CM (51C) on outdoor controller
board is disconnected.
5
Check if the units get their heat exchanger and filter dirty and
clogged.
Indication (O.B)
Error Name
Inspection method
OC336--3.qxp 05.8.29 7:21 PM Page 64
