Troubleshooting
Electrical Control System
204
2.4.4.15. J3 Malfunction
Malfunction
decision
conditions
When the voltage signal that IPM send to compressor drive
chip is abnormal, the display LED will show “P6” and AC will
turn off.
Supposed causes
●
Wiring mistake
●
Faulty IPM board
●
Faulty o
utdoor fan ass’y
●
Compressor malfunction
●
Faulty outdoor PCB
At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or
close to 0, the IPM is defective. Otherwise, please follow the procedure below:
J3 display
J3 display
PFC module protection
PFC module protection
Check whether the
connecting line between
main board and the PFC
module is connected tightly
Check whether the
connecting line between
main board and the PFC
module is connected tightly
Yes
Measure whether the voltage
between P and N is normal
refer to the
Appendix
3
?
Measure whether the voltage
between P and N is normal
refer to the
Appendix
3
?
No
Check
whether
the
inductance of PFC module
is good? If the inductance is
good, the resistance of the
two ports is 0
Check
whether
the
inductance of PFC module
is good? If the inductance is
good, the resistance of the
two ports is 0
Yes
Replace the inductance
Replace the inductance
No
Connect it tightly, check
normal or not
Connect it tightly, check
normal or not
Replace the outdoor main board
Replace the outdoor main board
Yes
Yes
No
No
Replace the PFC module
Replace the PFC module
Trouble is solved
Trouble is solved
Summary of Contents for Super DC Series
Page 1: ...Contents i Energy Related Products SUPER DC INVERTER SERIES Service Manual 2017...
Page 14: ...Service Space Indoor Units 12 3 Service Space 1000mm 1000mm 1000mm 1000m m Chart 3...
Page 17: ...Air Velocity Distributions Reference Data Indoor Units 15 30 42K Cooling Heating...
Page 18: ...Air Velocity Distributions Reference Data Indoor Units 16 48 55K Cooling Heating...
Page 23: ...Field Wiring Indoor Units 21 10 Field Wiring...
Page 30: ...Wiring Diagrams Indoor Units 28 4 Wiring Diagrams MTBU 12HWFN1 QRD0W MTB 18HWFN1 QRD0...
Page 32: ...Static Pressure Indoor Units 30 5 Static Pressure MTBU 12HWFN1 QRD0W MTB 18HWFN1 QRD0...
Page 33: ...Static Pressure Indoor Units 31 MTB 24HWFN1 QRD0 MTB 30HWFN1 QRD0...
Page 45: ...Features Indoor Units 43...
Page 53: ...Field Wiring Indoor Units 51 9 Field Wiring...
Page 57: ...Service Space Indoor Units 55 3 Service Space...
Page 67: ...Field Wiring Indoor Units 65 10 Field Wiring...
Page 70: ...Features Indoor Units 68...
Page 72: ...Service Space Indoor Units 70 3 Service Space...
Page 73: ...Wiring Diagrams Indoor Units 71 4 Wiring Diagrams MCA3U 12HRFN1 QRD0W MCA3 18HRFN1 QRD0...
Page 77: ...Field Wiring Indoor Units 75 10 Field Wiring MCA3U 12HRFN1 QRD0W MCA3 18HRFN1 QRD0...
Page 81: ...Features Console Type 79 1 7 Active carbon filter is standard...
Page 83: ...Console Type Console Type 81 3 Service Space...
Page 84: ...Console Type Console Type 82 4 Wiring Diagrams MFAU 12HRFN1 QRC8W MFA 16HRFN1 QRC8W...
Page 89: ...Console Type Console Type 87 10 Field Wiring...
Page 93: ...Service Space M Floor standing Type 91 3 Service Space...
Page 95: ...Wiring Diagrams M Floor standing Type 93 MFM 55ARFN1 RRD0...
Page 101: ...Field Wiring M Floor standing Type 99 MFM 55ARFN1 RRD0...
Page 105: ...Service Space GAFloor standing Type 103 3 Service Space...
Page 106: ...Wiring Diagrams GAFloor standing Type 104 4 Wiring Diagrams MFGA 55ARFN1 RRD0 B...
Page 112: ...Field Wiring GAFloor standing Type 110 10 Field Wiring...
Page 115: ...Dimensions Outdoor Units 113 Model KBtu h Unit mm W D H W1 A B 48 55 952 415 1333 1045 634 404...
Page 117: ...Wiring Diagrams Outdoor Units 115 3 Wiring Diagrams MOB30U 12HFN1 QRD0W MOB30U 16HFN1 QRC8W...
Page 118: ...Wiring Diagrams Outdoor Units 116 MOB30U 18HFN1 QRD0 MOCA30U 24HFN1 QRD0 MOD30U 30HFN1 QRD0...
Page 119: ...Wiring Diagrams Outdoor Units 117 MOD30U 36HFN1 QRD0 MOD30U 42HFN1 QRD0...
Page 120: ...Wiring Diagrams Outdoor Units 118 MOD30U 36HFN1 RRD0 MOD30U 42HFN1 RRD0...
Page 121: ...Wiring Diagrams Outdoor Units 119 MOE30U 48HFN1 QRD0 MOE30U 48HFN1 RRD0 MOE30U 55HFN1 RRD0...
Page 154: ...Refrigerantpipe installation Installation 152...
Page 179: ...Troubleshooting Electrical Control System 177 2 1 8 Display board of GA floor standing...