Nissan Leaf. Manual — part 808
SYSTEM
HAC-235
< SYSTEM DESCRIPTION >
[AUTO A/C (WITHOUT HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
AIR DISTRIBUTION
AUTOMATIC AIR CONDITIONING SYSTEM : PTC Heater Control
INFOID:0000000010121949
DESCRIPTION
• Based on the air mix door position and signals input from each sensor, the A/C auto amp. calculates the
PTC heater outlet air temperature.
• A/C auto amp. calculates the PTC heater operating rate so that the calculated PTC heater outlet air temper-
ature is achieved, and transmits the PTC heater operating rate request signal to the PTC heater via LIN
communication.
• Based on the A/C auto amplifier command, the control circuit inside the PTC heater controls the PTC heater
output by the PWM method.
NOTE:
MODE switch
*
VENT
—
—
—
B/L
FOOT
D/F
DEF switch
ON
Intake switch
*
REC
—
—
—
—
FRE
Temperature control
switch
Full cold
16.0
°C
—
16.5
°C – 29.5°C
AUTO
AUTO
Full hot
30.0
°C
ON/OFF switch
OFF
Fixed at the position where the ON/
OFF switch is pressed
—
—
Switch position
Door position
Mode door
In
ta
ke
do
or
Air mix door
Cen
ter ve
nt
ila
to
r/
de
fr
os
te
r do
or
Sub
- de
fr
ost
er do
or
Si
de
v
en
til
at
or
do
or
Fo
ot doo
r
Up
pe
r a
ir m
ix
do
or
Lowe
r a
ir m
ix
do
or
Discharge air flow
MODE/DEF setting
potion
Air outlet/distribution (Approx.)
Ventilator
Foot
Defroster
Center
Side
Front
Rear
50%
50%
—
—
—
30%
30%
28%
12%
—
—
15%
45%
20%
20%
—
15%
32%
13%
40%
—
15%
—
—
85%
HAC-236
< SYSTEM DESCRIPTION >
[AUTO A/C (WITHOUT HEAT PUMP)]
SYSTEM
If the difference between setting temperature and in-vehicle temperature is large and the A/C heater load is
high when the HEAT is ON (HEAT switch indicator lamp: ON) and A/C is OFF (A/C switch indicator lamp:
OFF), the heater control mode of the refrigerant cycle also operates. In addition, if the difference between set-
ting temperature and in-vehicle temperature is small and the A/C heater load is low, the PTC heater does not
operate. (Outlet air is warmed by the heater control mode of the refrigerant cycle.)
A/C UNIT CASE PROTECTION CONTROL
• The A/C auto amp. performs protection control for preventing the A/C unit case from being damaged by the
high temperature of the A/C unit case, due to PTC heater operation.
• A/C auto amp. detects the A/C unit case temperature around the PTC heater core with the A/C unit case
temperature sensor.
• When the temperature measured by the A/C unit case temperature sensor becomes 108
°C or more during
PTC heater operation, the A/C auto amplifier stops PTC heater operation.
• When the temperature measured by the A/C unit case temperature sensor becomes 105
°C or less, the A/C
auto amp. resumes PTC heater operation stopped by protection control.
AUTOMATIC AIR CONDITIONING SYSTEM : ECO Mode Control
INFOID:0000000010121950
DESCRIPTION
• When ECO mode is selected with the electric shift selector, VCM transmits the ECO mode request signal to
the A/C auto amp.
• When the A/C auto amp. receives the ECO mode request signal, it performs control that reduces the power
consumption of the A/C system.
ECO MODE CONTROL
• When ECO mode is selected, warm-up/cool-down control (refer to
HAC-232, "AUTOMATIC AIR CONDI-
TIONING SYSTEM : Electric Power Distribution Control"
) is cancelled and the special ECO mode power dis-
tribution control is performed.
• The A/C auto amp. determines the A/C system power consumption based on the ambient temperature and
set temperature.
NOTE:
When ECO mode control is activated, there is a noticeable decrease in A/C capacity when temperatures are
hot or cold.
AUTOMATIC AIR CONDITIONING SYSTEM : A/C-Heater Timer (Climate Ctrl. Timer)
INFOID:0000000010121951
DESCRIPTION
• When A/C-Heater Timer (Climate Ctrl. Timer) is set on the combination meter, the combination meter trans-
mits the A/C-Heater Timer (Climate Ctrl. Timer) request signal and A/C-Heater Timer (Climate Ctrl. Timer)
time setting (set vehicle occupancy time) to VCM.
ALIIA0792GB
SYSTEM
HAC-237
< SYSTEM DESCRIPTION >
[AUTO A/C (WITHOUT HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
• VCM starts two hours before the set A/C-Heater Timer (Climate Ctrl. Timer) time, and sends a request to the
A/C auto amp. for calculation of the A/C operation time required to achieve the target temperature, and
receives the results.
• When the operation time calculated by the A/C auto amp. has been reached, VCM starts the A/C auto amp.
and starts A/C-Heater Timer (Climate Ctrl. Timer).
A/C OPERATION DURING A/C-HEATER TIMER (CLIMATE CTRL. TIMER)
• During A/C-Heater Timer (Climate Ctrl. Timer), the A/C auto amp. operates the A/C under the following con-
ditions.
• If the charging plug is not inserted into the charging port at the time of A/C-Heater Timer (Climate Ctrl. Timer)
start, A/C-Heater Timer (Climate Ctrl. Timer) operation does not start. If the charging plug is disconnected
during A/C-Heater Timer (Climate Ctrl. Timer) operation, A/C-Heater Timer (Climate Ctrl. Timer) operation is
stopped.
AUTOMATIC AIR CONDITIONING SYSTEM : Door Motor Starting Position Reset
INFOID:0000000010121952
A step motor is used for the mode door motor and air mix door motor.
Because the step motors do not have position detection mechanisms, there may be a deviation between the
door position recognized by the A/C auto amp. and the actual door position. Therefore, the A/C auto amp. per-
forms motor zero position reset in order to align its recognized door position with the actual door position.
When either of the conditions below is satisfied, the A/C auto amp. performs motor zero position reset when
the power switch next turns ON or when A/C-Heater Timer (Climate Ctrl. Timer) turns ON.
• The 12V battery terminal is disconnected and then is reconnected.
• The power switch is turned OFF during operation of the mode door motor or air mix door motor a total of 60
times.
During zero position reset operation, the DEF switch indicator flashes for several seconds. No switch opera-
tions are accepted during this time.
AUTOMATIC AIR CONDITIONING SYSTEM : Fail-safe
INFOID:0000000010121954
• When the A/C auto amp. detects the conditions shown below, it stops operation of the electric compressor.
JSIIA1782GB
Temperature control switch
Intake switch
Mode switch
Electric compressor
25
°C
Recirculation
D/F (during heating)
Max. 3500 rpm
Auto (during cooling)
Malfunction judgment item
Description
Recovery condition
UART communication malfunction
(Electric compressor
→ A/C auto amp.)
A/C auto amp. judges that there is a UART com-
munications malfunction.
UART communications occur normally
for two seconds or more.
HAC-238
< SYSTEM DESCRIPTION >
[AUTO A/C (WITHOUT HEAT PUMP)]
SYSTEM
• When the electric compressor detects the following conditions, compressor operation is restricted.
Intake sensor malfunction
Open circuit or short circuit is detected in the in-
take sensor circuit.
Voltage value of intake sensor circuit re-
turns to normal.
Ambient sensor malfunction
Open circuit or short circuit is detected in the am-
bient sensor circuit.
Voltage value of ambient sensor circuit
returns to normal.
Malfunction judgment item
Description
Recovery condition
Malfunction judgment
item
Description
Compressor op-
eration
Recovery condition
Compressor discharge
temperature overheat
Compressor discharge refrigerant temperature (estimated
value) is more than 130
°C.
Stopped
Compressor stops for five
minutes then restarts.
Compressor IPM over-
heat
IPM temperature is more than 125
°C within one minute af-
ter start.
Stopped
IPM temperature drops to
123
°C or less.
IPM temperature is more than 88
°C at least one minute af-
ter start.
IPM temperature drops to
86
°C or less.
Compressor voltage
saturation
Inverter output voltage is 140% or more.
Compressor
speed is limited.
Inverter output voltage drops
to under 140%.
Compressor overcur-
rent
Start failed three times because current of 35.1 A or more
flowed within 90 seconds after start.
Stopped
IGN_OFF
Current of 35.1 A or more flows when compressor is
stopped.
Compressor overload
DC input is more than 13.5 A.
Compressor
speed is limited.
DC input drops to 13.5 A or
less for 15 seconds.
Compressor low-voltage
malfunction
High voltage is below 230 V.
Stopped
High voltage rises to 235 V
or more.
Compressor high-volt-
age malfunction
High voltage is more than 420 V.
Stopped
High voltage drops to 415 V
or less.
Compressor IPM tem-
perature sensor mal-
function
It is judged that an IPM temperature sensor open circuit or
short circuit is occurred.
Stopped
The IPM temperature sensor
open circuit or short circuit
judgment is cancelled.
Compressor shunt sig-
nal offset malfunction
It is judged that an unexpected shunt signal value is oc-
curred.
Stopped
IGN_OFF
Compressor ROM,
RAM, AD malfunction
A data malfunction is detected in the ROM area or RAM
area.
It is judged that an unexpected AD value is occurred.
Stopped
IGN_OFF
Compressor discharge
temperature restriction
Estimated discharge temperature exceeded 110
°C.
Compressor
speed is limited.
IPM temperature drops to
108
°C or less.
Compressor IPM tem-
perature restriction
IPM temperature exceeded 83
°C.
Compressor
speed is limited.
IPM temperature drops to
81
°C or less.
Compressor low-speed
overload
Compressor is not operating at command speed.
Compressor
speed increase
Current is decreased and
compressor became able to
operate at command speed.
UART communication
malfunction (Electric
compressor
→ A/C auto
amp.)
Electric compressor judges that a UART communication
malfunction is occurred.
Stopped
UART communications oc-
cur normally for two seconds
or more.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст