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Failure Code Information

When the motor is failure-free standby, the LED indicator light of the driver will be on for 1 second, off for 1 second, and flickering 

following the cycle;
When the motor runs normally, the LED indicator light of the driver will be always on;

If there is failure, the indicator light will be on for 0.3 second, off for 0.3 second, flickering for N times and off for 3 seconds, then 

flickering following the cycle. Failure code and elimination method are as shown in the following table:

Flicker Times (N) of the

Driver Indicator Light

Failure Description

Suggested Elimination Method

1

Motor overcurrent protection

Check whether there is open circuit or short 
circuit on the motor lead

3

Over-voltage protection of driver DC bus

Check the power supply voltage value

4

Under-voltage protection of driver DC bus

Check the power supply voltage value

5

Motor stall protection

Check whether the motor or drought fan is loos-
ened or the air outlet is blocked

6/8

Motor stalling/boot failure protection

Check whether the drought fan got stuck by 
foreign matter

7

Motor open-phase protection

Check whether the motor or drought fan is poor 
repair stitching, or whether there is short circuit 
or open circuit on the motor lead

www.DaikinApplied.com 11 

IM 745-3

Summary of Contents for THC02

Page 1: ...Installation and Maintenance Manual IM 745 3 Group Fan Coil Part Number 668708901 Date October 2018 Ceiling Concealed Fan Coil Unit Models THC02 THC03 THC04 THC06 THC08 THC10 THC12...

Page 2: ...t should be unpacked in the presence of the agent so that the extent of the damage or loss can be determined The carri er s agent will make an inspection report and a copy will be given to the consign...

Page 3: ...is designed to be concealed in the ceiling Installation and maintenance should be performed by qualified personnel who are familiar with local codes and regulations and experi enced with this type of...

Page 4: ...ed and removable for cleaning It may be necessary to manually fill the trap at system start up or to run the unit for sufficient time to build a condensate seal The condensate trap and condensate pipi...

Page 5: ...www DaikinApplied com 5 IM 745 3 Wiring Diagrams Model C3H 02 12EA 208 230V 60Hz Model C3H 02 12JA 277V 60Hz...

Page 6: ...OR FIELD WIRING MAIN SWITCH G Y BLACK WHITE BLUE N L FAN SPEED SWITCH H RED SHF YELLOW HF M L BROWN MF ORANGE LF G Y BLACK M BLACK Figure 8 220V 1Ph 50Hz L G Y GREEN YELLOW FIELD WIRING LF FAN SPEED L...

Page 7: ...PEED MEDIUM G Y RED G Y BLUE RED L SOURCE POWER N FAN SPEED SWITCH SHF HF ORANGE BROWN M2 BLACK G Y BLACK ORANGE BROWN L M MF LF M1 BLACK MAIN SWITCH G G Y WHITE BLACK G Y GREEN YELLOW BLACK G Y GREEN...

Page 8: ...ot Water Connection 3 4 FPT Main Drain Connection 3 4 O D 8 82 Unit w o Plenum 18 35 Unit w o Plenum Optional LV 3SP Jbox 7 73 H x 6 54 W x 3 38 D always located on the end opposite the coil connectio...

Page 9: ...ssed air or water They can be vacuumed or brushed with a soft brush CAUTION Water coils exposed to freezing temperatures should be drained or anti freeze should be added to the water circuit to avoid...

Page 10: ...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...

Page 11: ...Driver Indicator Light Failure Description Suggested Elimination Method 1 Motor overcurrent protection Check whether there is open circuit or short circuit on the motor lead 3 Over voltage protection...

Page 12: ...ndard terms and conditions of sale including Limited Product Warranty Consult your local Daikin Applied representative for warranty details Refer to Form 933 430285Y To find your local Daikin Applied...

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