Carrier 38MVC, 38MVQ, 40MVC, 40MVQ CHART 7 -- UNIT NOT RUNNING, NO DIAGNOSTIC CODE

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CHART 7 -- UNIT NOT RUNNING, NO DIAGNOSTIC CODE
Yes
Use auto forced function.
Unit runs?
Reset remote and restart
the unit. Is unit running?
Problem solved
Check batteries. OK? Replace battery
Go to chart #13
Reset circuit breaker. Is unit
running?
Yes
Problem solved
Is there power to outdoor
unit?
Yes
Check fuse on outdoor
board. Ok?
Yes
Check input and output on
outdoor board. Ok?
Check components. Ok?
Flow charts 10 thru 12
Yes
No
Replace defective
component
Check wiring and circuit
breaker and fix
Replace fuse
Replace outdoor board
Check fuse(s) on indoor
board. Ok?*
Replace fuse
Replace indoor board
Check input and output on
indoor board. Ok?
Determine defective
component and replace
Yes Yes
Yes Yes
No No
No
No
No
No
No No
No
* For sizes 18 and 24 K units only. For sizes 9 and 12K units proceed to check inputs and outputs on indoor boards.
Yes
Use auto forced function.
Unit runs?
Reset remote and restart
the unit. Is unit running?
Problem solved
Check batteries. OK? Replace battery
Reset circuit breaker. Is unit
running?
Yes
Problem solved
Is there power to outdoor
unit?
Yes
Check fuse on outdoor
board. Ok?
Yes
Check input and output on
outdoor board. Ok?
Check components. Ok?
Flow charts 10 thru 12
Yes
No
Replace defective
component
Check wiring and circuit
breaker and fix
Replace fuse
Replace outdoor board
Check fuse(s) on indoor
board. Ok?*
Replace fuse
Replace indoor board
Check input and output on
indoor board. Ok?
Determine defective
component and replace
Yes Yes
Yes Yes
No No
No
No
No
No
No No
No
* For sizes 18 and 24 K units only. For sizes 9 and 12K units proceed to check inputs and outputs on indoor boards.
A08169
38/40MVC, MVQ