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PROBLEM
Unit/System Does Not Work
Cooling is Not Working Properly
Heating is Not Working Properly
Unit Stops During Operation
*Diagnostic lights are a combination of lights that illuminate in the display area on the unit. They are a combination of the lights seen during normal
operation.
Copyright 2020 CAC/BDP Corp. D 3300 Riverwood Parkway Atlanta GA, 30339 Edition Date: 12/20
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Table 3 — Troubleshooting
POSSIBLE CAUSE
•
The circuit breaker has tripped or a fuse
has blown.
•
Power failure.
•
Diagnostic lights illuminate.*
•
Voltage is too low.
•
The filter is blocked with dust.
•
Temperature is not set properly.
•
A window or door is open.
•
The outdoor unit is obstructed.
•
The fan speed is too low.
•
The operation mode is in FAN instead of
COOL.
•
The filter is blocked with dust.
•
Temperature is set too low.
•
A window or door is open.
•
The outdoor unit is obstructed.
•
The Off timer is not operating correctly.
•
Diagnostic lights illuminate.*
SOLUTION
•
Reset the circuit breaker or replace the fuse with
the specified replacement fuse.
•
Restart operation when the power is restored.
•
Call your service representative.
•
Call your service representative.
•
Clean the air filter.
•
Check the temperature and reset if necessary.
•
Ensure all doors and windows are closed while
operating the unit.
•
Remove the obstruction.
•
Change the fan speed selection.
•
Change the operating mode to COOL or reset
the unit.
•
Clean the air filter.
•
Check the temperature and reset if necessary.
•
Ensure all doors and windows are closed while
operating the unit.
•
Remove the obstruction.
•
Restart the operating mode.
•
Call your service representative.
Catalog No. OM-DHMVHA-01
Replaces: NEW
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