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roubleshootIng
Problem, Cause and Solution
If the unit does not work properly, first check the points reported in the table below before requesting service.
If the problem cannot be solved, contact your dealer or service center.
Problem Description
Possible Cause
Recommended Solution
The unit does not operate.
Power failure or the unit power is not on.
Wait until the power is on or turn on the unit
power.
The power plug is loose.
Plug in the power plug properly
The motor is damaged.
Replace the motor.
Abnormal noise and
vibration occur during unit
operation.
The motor bearing is damaged
Replace the motor.
Screws for fixing the fan and motor are loose.
Fix the screws securely.
The fan volute is deformed and collides with the
fan impeller, or the impeller is deformed.
Replace the fan.
Sundries exist in the ventilation outlet or the duct. Remove the sundries.
The air filter is blocked.
Replace the new air filter
The air supply is not
smooth or the air flow
volume is small.
The return air inlet or air outlet of unit is blocked. Remove the obstacle.
The air filter is blocked.
Replace the new air filter.
The cooling or heating
function fails.
The electric control valve of unit is not started.
Start the electric control valve of unit.
The circulating pump is not started. As a result,
the cold or hot water does not flow.
Start the circulating pump.
The heat exchanger fins are blocked or pushed
down.
Clean and repair the heat exchanger.
Temperature of the cold water during cooling is
too high, or temperature of the hot water during
heating is too low.
Adjust the configured temperature of the unit.
The set temperature of temperature controller is
inappropriate.
Adjusted the set temperature of the temperature
controller.
The air filter is blocked.
Replace the new air filter.
Water leaks.
The condensate drain pan is blocked.
Clean the condensate drain pan.
The unit is not installed horizontally.
Adjust the place of the unit until it is placed
horizontally.
Cold water is being provided continuously when
the fan has already stopped.
Stop the electric control valve of unit or operate
the unit at a low gear.
Ambient temperature too high.
Perform dehumidification and avoid the entering
of high-temperature and high-humidity air into
indoor places.
The discharge valve is loose.
Tighten the discharge valve.
The unit piping leaks.
Contact the seller.
IM 745-3
10 www.DaikinApplied.com
