38
5. Diagnosis for failure start up malfunction (AP1 below is control board of outdoor unit)
Main detection points:
S
Is the compressor wiring correct?
S
Is the compressor stop time long enough?
S
Is the compressor damaged?
S
Is the refrigerant charged correctly?
Malfunction diagnosis process:
Energize the unit
and start it
If the compressor wire COMP(UVW) is
well connected and connection sequence
is correct
Replace control board AP1
Replace the
compressor
Is the malfunction
removed?
If the stop time of compressor
is more than 3min?
No
If the stop time is not enough and the
high and low pressure of system is not
balance , please start it after 3min
Improve the connection situation
of control board AP1 and
compressor COMP, connect it
with wiring diagram
No
Yes
N
Is the unit overcharged?
Yes
Does the unit start
up normally?
N
Charge the
refrigerant according
to service manual
Yes
Does the unit start
up normally?
No
Yes
End
No
No
Fig. 41 – Troubleshooting
Summary of Contents for 38GRQB09-3
Page 10: ...10 Outdoor unit Fig 11 Sizes 09 12...
Page 46: ...46 EXPLODED VIEW AND PARTS LIST Indoor Unit Fig 47 Indoor Unit...
Page 48: ...48 OUTDOOR UNIT Fig 48 Outdoor Unit...
Page 50: ...50 Fig 49...
Page 53: ...53 Shut off power hold both ends of horizontal...
Page 54: ...54...
Page 55: ...55...
Page 56: ...56 ziptie side cutters...
Page 57: ...57...
Page 58: ...58...
Page 59: ...59...
Page 60: ...60...
Page 73: ...73 6 7 8...
Page 74: ...74 9 Remove electric box 10 Remove evaporator...
Page 75: ...75...
Page 76: ...76 11 Remove swing blade...
Page 77: ...77 12 Remove cross flow blade and motor...
Page 78: ...78 13 Remove drive box...
Page 90: ...90 APPENDIX Appendix 1 Reference Sheet of Celsius and Fahrenheit...
Page 95: ...95 UNIT BREAKDOWNS a b c d e...
Page 96: ...96 f g h...
Page 97: ...97...
Page 98: ...98...
Page 99: ...99...