Carrier High Wall Duct Free Split System 38MVC Service Manual page 32

CHART 7 - - UNIT NOT RUNNING, NO DIAGNOSTIC CODE
No No
Reset circuit breaker. Is unit Reset circuit breaker. Is unit
No No
running? running?
Yes Yes
Problem solved Problem solved
* For sizes 18 and 24 K units only. For sizes 9 and 12K units proceed to check inputs and outputs on indoor boards. * For sizes 18 and 24 K units only. For sizes 9 and 12K units proceed to check inputs and outputs on indoor boards.
Use auto forced function. Use auto forced function.
Unit runs? Unit runs?
Yes Yes
Reset remote and restart Reset remote and restart
No No
the unit. Is unit running? the unit. Is unit running?
Yes Yes
Problem solved Problem solved
No No
Is there power to outdoor Is there power to outdoor
unit? unit?
Yes Yes
Check fuse on outdoor Check fuse on outdoor
No No
board. Ok? board. Ok?
Yes Yes
Check input and output on Check input and output on
No No
outdoor board. Ok? outdoor board. Ok?
Yes Yes
Yes Yes
Check components. Ok? Check components. Ok?
Flow charts 10 thru 12 Flow charts 10 thru 12
No No
Replace defective Replace defective
component component
No No
Check batteries. OK? Check batteries. OK?
Yes Yes
Go to chart #13
Check wiring and circuit Check wiring and circuit
breaker and fix breaker and fix
Replace fuse Replace fuse
Replace outdoor board Replace outdoor board
Check fuse(s) on indoor Check fuse(s) on indoor
Yes Yes
board. Ok?* board. Ok?*
No No
Replace fuse Replace fuse
32
Replace battery Replace battery
Replace indoor board Replace indoor board
No No
Check input and output on Check input and output on
indoor board. Ok? indoor board. Ok?
Determine defective Determine defective
component and replace component and replace
A08169