Sinclair ASGE-18AI - Page 124

DC INVERTER U-MATCH AIR CONDITION MAINTENANCE
118
DC busbar undervoltage protection◆
E5 displayed
on wired
controller
(overcurrent
protection)
Monitor display
Mainboard indicator
DC busba
r
overvoltage
protection
Bright Blink
Blink Bright
Blink Bright
If the input voltage is
within working range
(185
264VAC)?
If the voltage of power grid is
too high, please immediately
cut off the power and neve
r
start the unit. Otherwise, it
might damage the unit o
r
cause fire!
Does this occur when
the compressor is
running?
Does this occu
r
repeatedly in 1 hour?
Does this occur when
the compresso
r
frequency is
reduced?
PFC board abnormal.
1.Please check if the resisto
r
R6, R3 and R9 in voltage
sampling circuit on PFC board is
abnormal
2. Please check if the
connection cable on PFC board
and driver board is loose,
broken or in poor contact.
3.Replace PFC board.
Caused by interference.
Please check the cable
routing or determine the
source of interference,
while taking
anti-interference
measures.
The input voltage is lowe
r
than the lower limit of the
voltage. Please check if the
diameter of power cable
can meet the requirements,
or if the cable is too long
thus causing severe voltage
distribution.
PFC board abnormal.
1.Please check if the
resistor R6, R3 and R9
in voltage sampling
circuit on PFC board is
abnormal
3.Replace PFC board.
Record and feed back
No
Yes
No
Yes
Yes
No
No
Yes