KeepRite DLCCAR Service Manual - page 38
38
328 080000 01
Specifications subject to change without notice.
TROUBLESHOOTING (CONT)
NO.
MALFUNCTION
NAME
Display Method of Indoor Unit
Display Method of
Outdoor Unit
AC STATUS
POSSIBLE CAUSES
Dual-8
Code
Display
Indicator Display (during
blinking, ON 0.5s and OFF 0.5s)
Indicator has 3 kinds of display
status and during blinking, ON
0.5s and OFF 0.5s
Operation
Indicator
Cool
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
19
Decrease
frequency due to
high air discharge
F9
OFF 3S:
blinks
9 times
OFF 1S:
blinks twice
All loads operate normally, while the
operation frequency for the compressor
decreases.
Overload or temperature is too high;
Malfunction of the electric expansion valve
(EKV)
20
Limit/ decrease
frequency due to
anti-freeze
FH
OFF 3S:
blinks 2
times
OFF 3S:
blinks 2
times
OFF 1S
and
blink
4 times
All loads operate normally, while the
operation frequency for the compressor
is decreases.
Poor air-return in indoor unit or fan speed is
too low
21
Voltage for DC
bus-bar is too high
PH
OFF 3S:
blinks 11
times
OFF 1S:
Blinks 13
times
During the cooling and drying
operation, the compressor stops while
the indoor fan operates. During the
heating operation, the entire unit stops.
1. Measure the voltage of position L and N
on wiring board (XT), if the voltage is higher
than 265VAC, turn on the unit after the supply
voltage is increased to the normal range.
2.If the AC input is normal, measure the
voltage of electrolytic capacitor C on the
control panel (AP1), if its normal, there is a
malfunction on the circuit. Replace the
control panel (AP1)
22
Voltage of DC
bus-bar is too low
PL
OFF 3S:
blinks 21
times
OFF 1S:
blinks 12
times
During the cooling and drying
operation, compressor stops while the
indoor fan operates. During the heating
operation, the entire unit stops.
1. Measure the voltage of position L and N
on wiring board (XT), if the voltage is higher
than 150VAC, turn on the unit after the supply
voltage is increased to the normal range.
2.If the AC input is normal, measure the
voltage of electrolytic capacitor C on control
panel (AP1), if its normal, there is a
malfunction for the circuit, replace the control
panel (AP1)
23
Compressor Min
frequency in test
state
P0
during
blinking,
ON 0.25s
and OFF
0.25s
during
blinking,
ON 0.25s
and OFF
0.25s
Shows during minimum cooling or minimum.
heating test
24
Compressor rated
frequency in test
state
P1
during
blinking,
ON 0.25s
and OFF
0.25s
during
blinking,
ON 0.25s
and OFF
0.25s
Showing during nominal cooling or nominal
heating test
25
Compressor
maximum frequency
in test state
P2
during
blinking,
ON 0.25s
and OFF
0.25s
during
blinking,
ON 0.25s
and OFF
0.25s
Showing during max. cooling or max. heating
test
26
Compressor
intermediate
frequency in test
state
P3
during
blinking,
ON 0.25s
and OFF
0.25s
during
blinking,
ON 0.25s
and OFF
0.25s
Showing during middle cooling or middle
heating test
27
Overcurrent
protection of phase
current for
compressor
P5
OFF 3S:
blinks
15 times
During the cooling and drying
operation, the compressor stops while
the indoor fan operates. During the
heating operation, the entire unit stops
the operation.
Refer to the malfunction analysis (IPM
protection, loss of synchronism protection
and overcurrent protection of phase current
for compressor.
28
Charging
malfunction of
capacitor
PU
OFF 3S:
blinks 17
times
During the cooling and drying
operation, the compressor stops while
the indoor fan operates. During the
heating operation, the entire unit stops
the operation.
Refer to the part three—charging malfunction
analysis of capacitor
29
Malfunction of
module temperature
sensor circuit
P7
OFF 3S:
blinks 18
times
During the cooling and drying
operation, the compressor stops while
the indoor fan operates. During the
heating operation, the entire unit stops
the operation.
Replace outdoor control panel AP1
30
Module high
temperature
protection
P8
OFF 3S:
blinks19
times
During the cooling operation, the
compressor stops while the indoor fan
operates. During the heating operation,
the entire unit stops.
After the complete unit is de-energized for
20mins, check whether the thermal grease
on the IPM Module of outdoor control panel
radiator is inserted tightly. If its not, replace
the control panel AP1.
31
Decrease frequency
due to high
temperature
resistant during
heating operation
H0
OFF 3S:
blinks
10 times
All loads operate normally, while the
operation frequency for the compressor
is decreases.
Refer to the malfunction analysis (overload,
high temperature resistant)
32
Static de-dusting
protection
H2
OFF 3S
blinks
twice
33
Overload protection
for compressor
H3
OFF 3S:
blink
3 times
OFF 1S:
blinks
8 times
During the cooling and drying
operation, the compressor stops while
indoor fan operates. During the heating
operation, the entire unit stops
operating.
1. Wiring terminal OVC-COMP is loosened.
Normally the resistance for this terminal
should be less than 1ohm.
2.Refer to the malfunction analysis
(discharge protection, overload)