Haier SYJS-0308 Service Manual page 78

Treatment: use the DC voltage grade of multimeter to test the plastic sealed motor to find if
there is any feedback signal, determine if the plastic sealed motor is abnormal. If normal,
change the indoor unit PC board.
(6) Indoor unit trouble indication: Timer indicator flashes (12 times)
Abnormal reason:
Indoor unit PC board is improper
Treatment: change the improper indoor unit PC board.
(7) Indoor unit trouble indication: operation indicator flashes (once, twice, 3 times, 4 times, 5
times)
Abnormal reasons:
Heat sensitive resister is short circuit or open circuit
The treatment to sensor output part in PC board is improper, such as poor contact of
package part, the electrolytic capacitor for filtering is failed, etc.
Treatment:
Remove the heat sensitive resister, test and measure its numerical value. According to the
resister temperature character table to evaluate if it is heat sensitive resister abnormal. If
numerical value of resister is normal, check if it is poor contact. If contact is good, replace the
indoor unit PC board.
(8) Indoor unit trouble indication: operation indicator flashes (6 times)
Abnormal reasons:
Power voltage is low
Power is instantaneously stopped
Compressor is locked
Treatment: power on again to operate unit, check power voltage (Is the over 40A power
used?)
(9) Indoor unit trouble indication: operation indicator flashes (7 times)
Abnormal reasons:
Power voltage is low
Power is instantaneously stopped
Treatment: Treatment: power on again to operate unit, check power voltage (Is the over 40A
power used?), check if the power cord is too thin.
(11) Indoor unit trouble indication: operation indicator flashes (8 times)
Abnormal reasons:
The current mutual inductor on the outdoor unit PC board is failed
The driving circuit of compressor is disconnected
Treatment: power on again to operate unit. Test if there is current through the compressor
driving circuit. If there is, change the PC board.
(12) Indoor unit trouble indication: operation indicator flashes (9 times)
Abnormal reasons:
High load compelling operation
Power voltage is low
Power is instantaneously lowered or power cut
The driving circuit of compressor is short circuit
Compressor is locked
Treatment: power on again to operate unit. Check if there is too much refrigerant in the
cooling system? Check power voltage (Is over 40A power used?) check if there are parts in
compressor driving circuit short-circuited? Check if there is any parts damage, poor contact,
pull out the connection wire of power module UVW end, test if there is the same voltage
between U-V, V-W, W-U? (AC80V-280V)
(13) Indoor unit trouble indication: operation indicator flashes (10 times)
Abnormal reason: PC board of outdoor unit is improper.
Treatment: change PC board of outdoor unit.
(14) Indoor unit trouble indication: operation indicator flashes (11 times)
Abnormal reasons:
System is high load compelling operated