37
4. Diagnosis for anti- high temperature, overload protection (AP1 below is control board of the outdoor unit).
Main detection points:
S
If the outdoor ambient temperature is in the normal range
S
If the indoor and outdoor fan is running normal
S
Are the units clear of dirt and debris?
Malfunction diagnosis process:
1. Check if fan terminal
OFAN is connected well
2. Test if resistance value
of any two terminals is less
than 1k with ohmic meter
Do the indoor and outdoor
fan work?
After the unit
de-energized for 20min
Replace
control board
AP1
Outdoor unit coils clean?
Clean coils
Replace
outdoor fan
Y
Replace fan
capacitor C1
High temperature,
overload protection
Above operating envelope
If the outdoor ambient temperature is
higher than 127 ºF?
No
No
Y
No
End
Yes
Yes
Yes
Fig. 40 – 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...