Skyworth KEB001Z2470, Service Manual

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43
Troubleshooting
H2
Compressor phase
current peak protection
√ Outdoor See Diagram 6 See Diagram 6
H3
Compressor phase
current RMS protection
√ Outdoor See Diagram 7 See Diagram 7
H4 IPM protection √ Outdoor See Diagram 8 See Diagram 8
H5 IPM overheat protection √ Outdoor
1. The radiator ventilation is
abnormal
2. IPM module thermal paste
dry solid or screw loose
3. the mainboard is damage
1. Check the radiator
ventilation is normal
2. Check the IPM module
thermal paste dry solid
or screw loose is normal
3. Change the main board
H6
Compressor phase
ciurcuit detection error
√ Outdoor the mainboard is broken change the mainboard
H7
Compressor phase loss
error
√ Outdoor
1.mainboard and
compressor unconnected
2.the mainboard is broken
1.check the connecting of
mainboard and compressor
2.change the mainboard
H8
Outdoor DC fan motor
error
√ Outdoor
1.Outdoor motor fan is
blocked
2.mainboard and DC fan
motor unconnected
3.the mainboard is broken
4.DC fan motor is broken
1.remove the block
2.check the connecting
of mainboard and DC fan
motor
3.change the mainboard
4.change the DC fan motor
H9
Outdoor DC fan motor
phase current detection
circuit error
√ Outdoor The mainboard is broken Change the mainboard
L0 Jumper error √ Indoor See Diagram 9 See Diagram 9
L1
PG Indoor motor zero
crossing detecting circuit
malfunction
√ Indoor The mainboard is broken Change the mainboard
L2 Indoor fan motor error √ Indoor See Diagram 10 See Diagram 10
L3
Indoor display
communication between
Indoor and Outdoor
failure
√ Indoor See Diagram 11 See Diagram 11
L4
Select the port level
abnormal error
√ Indoor The mainboard is broken Change the mainboard
L5 Indoor EEPREM error √ Indoor See Diagram See Diagram
L6
Outdoor display
communication between
Indoor and Outdoor
failure
√ Outdoor See Diagram 12 See Diagram 12
LL Trial running √ Indoor Normal Function Normal Function
P0 Outdoor EEPREM error √ Outdoor 1.EEPROM chip(U8)loose.
2.The mainboard is broken.
1.Check the EEPROM
chip(U8)is fixed.
2.Change the mainboard.
P1
Power On failure \
Chaging ciurcuit error
√ Outdoor
1.The voltage of power
supply is too low.
2.The mainboard is broken.
1.Check the voltage of
power supply.
2.Change the mainboard.
P2
Alternating current
protection \ Feedforward
voltage protection
√ Outdoor
1.The voltage of power
supply is too low.
2.The mainboard is broken
1.Check the voltage of
power supply.
2.Change the mainboard.
P3 High voltage protection √ outdoor
1.The voltage of power
supply is too high.
2.The mainboard is broken.
1.Check the voltage of
power supply.
2.Change the mainboard.
P4 Low voltage protection √ Outdoor
1.The voltage of power
supply is too low.
2.The mainboard is broken.
1.Check the voltage of
power supply.
2.Change the mainboard.
P5
DC line voltage drop
protection
√ Outdoor
1.The voltage of power
supply is unstable.
2.The mainboard is broken.
1.Check the voltage of
power supply.
2.Change the mainboard.
P6
Machine current detection
circuit error
√ Outdoor 1.Refrigerant leakage.
2.The mainboard is broken.
1.Check the refrigerant
leakage.
2.Change the mainboard.
P7 Over-current protection √ Outdoor See Diagram 13 See Diagram 13
P8
PFC current detection
circuit error
√ Outdoor The mainboard is broken Change the mainboard
P9 PFC protection √ Outdoor See Diagram 14 See Diagram 14