Troubleshooting; Problem, Cause And Solution - Daikin THC02 Installation And Maintenance Manual

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