Nissan Leaf. Manual - part 763
A/C AUTO AMP.
HAC-55
< ECU DIAGNOSIS INFORMATION >
[AUTO A/C (WITH HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Fail-safe
INFOID:0000000010121772
• When the A/C auto amp. detects the conditions shown below, it stops operation of the electric compressor.
• When the electric compressor detects the following conditions, electric compressor operation is restricted.
• When the PTC heater detects the following conditions, PTC heater operation is stopped.
Malfunction judgment item
Description
Recovery condition
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
Electric com-
pressor opera-
tion
Recovery condition
Compressor low voltage mal-
function
When the high voltage system input voltage is
less than 230 V
Stopped
High voltage system input volt-
age is 230 V or more
Compressor high voltage
malfunction
When the high voltage system input voltage is
more than 420 V
Stopped
High voltage system input volt-
age is 420 V or less
Compressor internal commu-
nication malfunction
When a malfunction is detected in AC inverter in-
ternal communication
Stopped
Internal communication returns
to normal
Compressor low voltage sys-
tem malfunction
Voltage of battery power supply input to electric
compressor is 9 V or less or 17 V or more.
Stopped
Voltage of battery power sup-
ply input to electric compressor
is more than 9 V or less than 17
V.
Compressor internal commu-
nication malfunction
When overcurrent is detected in inverter
Stopped
Power switch OFF
Compressor internal commu-
nication malfunction
When open circuit is detected in inverter
Stopped
Power switch OFF
Compressor current sensor
malfunction
When inverter is OFF, the detected current value
in inverter is the standard value or more
Stopped
Power switch OFF
Compressor overload
When the high load status at low speed of electric
compressor is continued
Stopped
Power switch OFF
Compressor overheat
When the inverter temperature exceeds the stan-
dard value
Stopped
Inverter temperature is the
standard value or less
Compressor system malfunc-
tion
When the internal system malfunction stop oc-
curs repeatedly
Stopped
Power switch OFF
Compressor high voltage sys-
tem malfunction
When the standard value voltage is input to AC
inverter
Stopped
Power switch OFF
Compressor communication
malfunction HVAC
→ COMP
When the electric compressor cannot receive the
signal transmitted from the A/C auto amp
Stopped
LIN communication returns to
normal
Compressor internal system
malfunction
When a malfunction is detected in the CPU, ROM
or RAM of the inverter
Stopped
Power switch OFF
Compressor HVIL circuit mal-
function
When HVIL open circuit is detected in electric
compressor system
Stopped
HVIL circuit in electric com-
pressor system returns to nor-
mal
Compressor communication
malfunction COMP
→ HVAC
When the A/C auto amp cannot receive the signal
transmitted from the electric compressor
Stopped
LIN communication returns to
normal
Compressor voltage limit
When the command speed control is disabled
due to voltage decrease of high voltage system
Compressor
speed is limited.
Voltage of high voltage system
returns to normal
Compressor motor current
limit
When the command speed control is disabled
due to decrease of motor upper limit
Compressor
speed is limited.
Motor current returns to normal
Compressor overheat
When the inverter temperature exceeds the stan-
dard value
Compressor
speed is limited.
Inverter temperature is the
standard value or less