PROBLEM
POSSIBLE CAUSE
TO CORRECT
Fresh air or exhaust air door opens
on applicable models.
Close doors. Instruct customer on
use of this feature.
Low capacity-undercharge.
Check for leak and make repair.
Does not cool, or cools only slightly.
Compressor not pumping properly.
Check amperage draw against
nameplate. If not conclusive. Make
pressure test.
Fuse blown or circuit tripped.
Replace fuse, reset breaker. If
repeats check fuse or breaker size.
Check for shorts in unit wiring and
components.
System switch in OFF position.
Set switch correctly.
Inoperative system switch.
Test for continuity in each switch
position.
Unit does not run
Loose or disconnected wiring at
switch or other components
Check wiring and connections.
Reconnect per wiring diagram.
Poorly installed unit.
Refer to Installation instruction for
proper installation.
Fan blade-striking chassis.
Reposition-adjust motor mount.
Compressor vibrating.
Check that compressor grommets
have not deteriorated.
Check that compressor mounting
parts are not missing
Noisy operation
Improperly mounted or loose cabinet
parts.
Check assembly and parts for
looseness rubbing and rattling.
Loss of charge in thermostat bulb.
Place jumper across thermostat
terminals to check if unit operates. If
unit operates replace thermostat.
Loose or broken parts in thermostat
Check as above.
Thermostat does not turn unit on.
Incorrect wiring.
Refer to appropriate wiring diagram.
Содержание LCU-07
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