Error Diagnosis And Troubleshooting Without Error Code - Carrier 38MPRA Series Service Manual

ERROR DIAGNOSIS AND TROUBLESHOOTING WITHOUT ERROR CODE

Remote
Electrical Circuit
Maintenance
Possible causes
The main Loose
Power failure
of trouble power tripped connections
Unit will not start
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Operation is
erratic,
unpredictable or
unit is
unresponsive
Cannot set
desired temp.
Unit is on
but the wind is
not cold (hot)
Unit runs, but
shortly stops
The unit starts up
and stops often
Unit runs
continuously
however
insufficient
cooling
(heating)
Cool can not
change to heat
Unit is noisy
Unit emits
bad odor
Inspect
Test method/
Close the
Test voltage connections
remedy power switch
- tighten
UNIT DAMAGE HAZARD
Be sure to turn off unit before any maintenance to prevent damage or
injury.
Table 18 — Remote Maintenance
The voltage is The remote Broken
Faulty Dirty
too high or control is remote
transformer air filter
too low powered off control
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Replace the Replace Clean
Change the
transformer Test voltage battery of the remote or
remote control control replace
WARNING
Refrigerant Circuit
The setting
The ambient
temp is SILENCE
temp. is too
Dirty higher/lower function is
high/low when
condenser than the Fan mode activated
the mode is
fins room's (optional
cooling/
(cooling/ function)
heating
heating)
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Turn off
Adjust the Turn the Adjust to
Clean SILENCE
setting temp. AC later Cool mode
function.
Others
Frosting and Loose hold
Heavy load
defrosting down bolts Not air tight
condition
frequently and/or screws
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Close all
Turn the Check the Tighten bolts
windows and
AC later heat load or screws
doors
Interference
from cell Shipping
Air inlet or
phones plates
outlet of either
towers and remained
unit is blocked
remote attached
boosters
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Reconnect the
power or
Remove the press ON/ Remove
obstacles OFF button on them
remote control
to restart