Hokkaido HKEN-HCNN 642XR Service Manual - page 34
Power
Timing
Running
Indoor
Outdoor
Resumable
Faulty indoor thermistor
Blinking
Off
Off
*
*
Sensor in short or broken current
Faulty indoor thermistor
Blinking
On
On
*
*
Sensor in short or broken current
Faulty EEPROM
Blinking
On
Blinking
*
*
Wrong data or no EEPROM
Defrosting temperature sensor
in short or broken current
On
On
Blinking
Poor contact of components or poor
control board
Compressor discharge
temperature sensor in short or
broken current
Blinking
On
Off
Poor contact of components or poor
control board
Thermistor on wiring board in
short current
On
Blinking
On
Poor contact of components or poor
control board
Poor communication
Off
Off
Blinking
1, Strong interruption 2, Poor wiring or
control board
Overheating discharge pipe
Off
Blinking
Off
1,Short or excessive gas 2, High
(
above 242v)or low (below 187v)
voltage 3,Jammed capillary tube
(compressor running fast with low
current input) 4,Faulty thermistor or
control board 5, High ambient
temperature
High AC current
Blinking
Blinking
Off
1, Excessive gas 2, Low voltage 3,Poor
CT or control board 4, Faulty
compressor, high running current
High DC current
Blinking
Blinking
On
1, Jammed compressor 2, Damaged
power module 3, High voltage (above
242v) or low voltage (below 187v)
Broken CT wire
Blinking
Off
Blinking
1, Damaged control board 2, Short gas
3, Poor 4-way valve switch
Low voltage
Off
Blinking
On
1, Low voltage input 2, Damaged control
board
Overload or high restrictions
Blinking
Blinking
Blinking
1, Jammed compressor 2, Damaged
power module 3, Irregular heat emitting
gum 4, High voltage (above 242v) or low
voltage (below 187v)
Indoor motor warning (BP AC,
DP OF K SERIES)
The indoor motor finds no motor signal in a 10-sencond period after increasing the voltage. Running for 30 senconds
after cutting off the output voltage for the indoor motor, AC gives no motor signal but warning under new voltage for the
motor. Both he power light and running light blink twice at 1 Hz/s and then the power light, timing light and running light
blink once. The sames cycle goes on.
Fault codes
Faulty Points
Power
Timing
Running
Indoor
Outdoor
Resumable
Faulty indoor thermistor
Blinking
Off
Off
*
*
Sensor in short or broken current
Faulty indoor thermistor
Blinking
On
On
*
*
Sensor in short or broken current
Faulty EEPROM
Blinking
On
Blinking
*
*
Wrong data or no EEPROM
Defrosting temperature sensor
in short or broken current
On
On
Blinking
Poor contact of components or poor
control board
Compressor discharge
temperature sensor in short or
broken current
Blinking
On
Off
Poor contact of components or poor
control board
Thermistor on wiring board in
short current
On
Blinking
On
Poor contact of components or poor
control board
Poor communication
Off
Off
Blinking
1, Strong interruption 2, Poor wiring or
control board
Overheating discharge pipe
Off
Blinking
Off
1,Short or excessive gas 2, High
(above 242v)or low (below 187v)
voltage 3,Jammed capillary tube
(compressor running fast with low
current input) 4,Faulty thermistor or
control board 5, High ambient
temperature
High AC current
Blinking
Blinking
Off
1, Excessive gas 2, Low voltage 3,Poor
CT or control board 4, Faulty
compressor, high running current
High DC current
Blinking
Blinking
On
1, Jammed compressor 2, Damaged
power module 3, High voltage (above
242v) or low voltage (below 187v)
Broken CT wire
Blinking
Off
Blinking
1, Damaged control board 2, Short gas
3, Poor 4-way valve switch
Low voltage
Off
Blinking
On
1, Low voltage input 2, Damaged control
board
Overload or high restrictions
Blinking
Blinking
Blinking
1, Jammed compressor 2, Damaged
power module 3, Irregular heat emitting
gum 4, High voltage (above 242v) or low
voltage (below 187v)
Indoor motor warning (BP AC,
DP OF K SERIES)
HKEN-HCNN 642 XR Fault display code
The indoor motor finds no motor signal in a 10-sencond period after increasing the voltage. Running for 30 senconds
after cutting off the output voltage for the indoor motor, AC gives no motor signal but warning under new voltage for the
motor. Both he power light and running light blink twice at 1 Hz/s and then the power light, timing light and running light
blink once. The sames cycle goes on.
Fault codes
Faulty Points
Classic Line Air Conditioner
Model: HKEN-HCNN 642 XR