64
OCH754A
Indication
Error
Outdoor controller
board
Contents
Check
code*
Inspection method
Detailed
reference
page
LED1
(Green)
LED2
(Red)
3 blinking 1 blinking Abnormality of Discharge
temperature (TH4) and Comp.
surface temperature (TH33)
U2
1
Check if stop valves are open.
2
Check if connectors (TH4, TH33, LEV-A, and LEV-B) on outdoor
controller board are not disconnected.
3
Check if unit is filled with specified amount of refrigerant.
4
Measure resistance values among terminals on indoor valve and
outdoor linear expansion valve using a tester.
P.28
Abnormality of superheat due to
low discharge temperature
U7
P.30
2 blinking Abnormal high pressure (High
pressure switch 63H worked.)
U1
1
Check if indoor/outdoor units have a short cycle on their air ducts.
2
Check if connector (63H) (63L) on outdoor controller board is not
disconnected.
3
Check if heat exchanger and filter is not dirty.
4
Measure resistance values among terminals on linear expansion
valve using a tester.
P.28
Abnormal low pressure (Low
pressure switch 63L worked.)
UL
P.32
3 blinking Abnormality of outdoor fan motor
rotational speed
U8
1
Check the outdoor fan motor.
2
Check if connector (TH3) (T
63HS
) on outdoor controller board is
disconnected.
P.30
Protection from overheat
operation(TH3)(T
63HS
)
Ud
P.31
4 blinking Compressor overcurrent breaking
(Startup locked)
UF
1
Check if stop valves are open.
2
Check looseness, disconnection, and converse connection of
compressor wiring.
3
Measure resistance values among terminals on compressor using a
tester.
4
Check if outdoor unit has a short cycle on its air duct.
P.31
Compressor overcurrent breaking UP
P.32
Abnormality of current sensor
(P.B.)
UH
P.31
Abnormality of power module
U6
P.29
5 blinking Open/short of discharge
thermistors (TH4) (TH33)
U3
1
Check if connectors (TH3,TH32,TH33,TH4, and TH7/6) on outdoor
controller board and connector (CN6) on outdoor power board are
not disconnected.
2
Measure resistance value of outdoor thermistors.
P.29
Open/short of outdoor thermistors
(TH3, TH32, TH6, TH7 and TH8)
U4
P.29
6 blinking Abnormality of heatsink
temperature
U5
1
Check if indoor/outdoor units have a short cycle on their air ducts.
2
Measure resistance value of outdoor thermistor (TH8).
P.29
7 blinking Abnormality of voltage
U9
1
Check looseness, disconnection, and converse connection of
compressor wiring.
2
Measure resistance value among terminals on compressor using a
tester.
3
Check if power supply voltage decreases.
P.30
4 blinking 1 blinking Abnormality of room temperature
thermistor (TH1)
P1
1
Check if connectors (CN20, CN21, CN29 and CN44) on indoor
controller board are not disconnected.
2
Measure resistance value of indoor thermistors.
**
Abnormality of pipe temperature
thermistor /Liquid (TH2)
P2
**
Abnormality of pipe temperature
thermistor/Condenser-Evaporator P9
**
2 blinking Abnormality of drain sensor (DS)
Float switch connector open (FS)
P4
1
Check if connector (CN31)(CN4F) on indoor controller board is not
disconnected.
2
Measure resistance value of indoor thermistors.
3
Measure resistance value among terminals on drain-up machine
using a tester.
4
Check if drain-up machine works.
5
Check drain function.
**
Indoor drain overflow protection
P5
**
3 blinking Freezing (cooling)/overheating
(heating) protection
P6
1
Check if indoor unit has a short cycle on its air duct.
2
Check if heat exchanger and filter is not dirty.
3
Measure resistance value on indoor and outdoor fan motors.
4
Check if the inside of refrigerant piping is not clogged.
**
4 blinking Abnormality of pipe temperature
P8
1
Check if indoor thermistors(TH2 and TH5) are not disconnected
from holder.
2
Check if stop valve is open.
3
Check converse connection of extension pipe. (on plural units
connection)
4
Check if indoor/outdoor connecting wire is connected correctly.(on
plural units connection)
**
*Check code displayed on remote controller
**Refer to service manual for indoor unit.
Содержание SUZ-KA24NAHZ
Страница 13: ...13 OCH754A 6 OUTLINES AND DIMENSIONS Unit mm in SUZ KA24NAHZ ...
Страница 14: ...14 OCH754A Unit mm in SUZ KA30NAHZ SUZ KA36NAHZ 1 1 1 ...
Страница 15: ...15 OCH754A 7 WIRING DIAGRAM SUZ KA24NAHZ ...
Страница 16: ...16 OCH754A SUZ KA30NAHZ SUZ KA36NAHZ ...