Sinclair SDV5 Series Service Manual page 50

2.6 E6: DC fan motor error; Eb: E6 protection appears 6 times in one hour (For all models)
2.6.1 Digital display output
E6 or Eb
2.6.2 Description
 E6:DC fan motor error; Eb: E6 protection appears 6 times in one hour
 The system stops running.
 Error code is displayed on the outdoor unit PCB.
2.6.3 Trigger / recover condition
 Trigger condition:
For E6 protection: Main control board can't receive the fan speed feedback signal.
For Eb protection: E6 protection appears 6 times in one hour.
 Recover condition: The fan speed feedback signal is normal.
 Reset method:For E6 protection, Resume automatically; For Eb protection, Manually restart.
2.6.4 Possible causes
 Loosened wiring within electric control box.
 DC fan motor damaged.
 Main PCB damaged.
2.6.5 Procedure
E6, Eb
DC fan motor is forbidden to pluck and
insert in power on conditions, operation
when the capacitance discharge finished (3
LEDs all off)
No
Check whether DC fan motor is normal
Yes
Pull out the connection wire of DC fan
motor, Check the Voltage of DC fan motor
310V port and 15V port to confirm whether
their voltage is normal
No
Check whether the L and N port ( in the left
bottom of ODU main board) has 220V input
No
Power off and then exclude fault source.
Red to black: standby 310V startup 375V
White to black: DC 15V
Yellow to black: DC 0-6V(varies with speed)
Blue to black: DC 15-0V(varies with speed)
No
DC fan motor is fault
Disconnect the DC fan motor wire and
test the voltage of pin which
Yes
corresponding to yellow and black
wire, check whether the voltage
Yes
ODU main control board is fault
change
No
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