Unit installation

AR-C330 SELF DIAG MESSAGE AND TROUBLESHOOTING 10 - 50
H4 0 Case 4 Trouble
position/
cause
AC main power PWB
trouble
Remedy (Check) Check the
operation of the heater
lamp. (SIM 5-2).
(Repair) AC main power
PWB replacement / SIM 14
(After-work)
Case 5 Trouble
position/
cause
Interlock switch (door)
trouble
Remedy (Check) Check the interlock
switch (door).
(Repair) Replace the
interlock switch (door). /
SIM 14
(After-work)
Case 6 Trouble
position/
cause
Thermostat operation or
trouble
Remedy (Check) Check the
thermostat contact.
(Repair) Reset or replace
the thermostat. / SIM 14
(After-work)
Case 7 Trouble
position/
cause
Heater lamp trouble
Remedy (Check) Check the
operation of the heater
lamp. (SIM5-2)
(Repair) Replace the heater
lamp. / SIM 14
(After-work)
Main
code
Sub
code
Title
Fusing section (lower) low
temperature trouble (HL2)
H4 1 Phenomena Display Lamp
H4 1
Message
Detail The specified temperature
is not reached within the
specified time (5 min) after
starting warm-up.
Section Fusing
Operation
mode
All modes
Note
Case 1 Trouble
position/
cause
Temperature sensor
(Thermistor) trouble
Remedy (Check) Check for dirt on
the temperature sensor
(Thermistor).
(Repair) Clean or replace
the temperature sensor
(Thermistor). / SIM 14
(After-work)
Main
code
Sub
code
Title
Fusing section (upper) low
temperature trouble (HL1)
H4 1 Case 2 Trouble
position/
cause
PCU SUB PWB trouble
Remedy (Check) Check the PCU
SUB PWB fusing
temperature sensor circuit.
(Repair) PCU SUB PWB
replacement / SIM 14
(After-work)
Case 3 Trouble
position/
cause
Heater lamp control PWB
(AC SUB PWB) trouble
Remedy (Check) Check the
operation of the heater
lamp. (SIM 5-2)
(Repair) Replace the heater
lamp control PWB (AC SUB
PWB). / SIM 14
(After-work)
Case 4 Trouble
position/
cause
AC main power PWB
trouble
Remedy (Check) Check the
operation of the heater
lamp. (SIM 5-2).
(Repair) AC main power
PWB replacement / SIM 14
(After-work)
Case 5 Trouble
position/
cause
Interlock switch (door)
trouble
Remedy (Check) Check the interlock
switch (door).
(Repair) Replace the
interlock switch (door). /
SIM 14
(After-work)
Case 6 Trouble
position/
cause
Thermostat operation or
trouble
Remedy (Check) Check the
thermostat contact.
(Repair) Reset or replace
the thermostat. / SIM 14
(After-work)
Case 7 Trouble
position/
cause
Heater lamp trouble
Remedy (Check) Check the
operation of the heater
lamp. (SIM5-2)
(Repair) Replace the heater
lamp. / SIM 14
(After-work)
Main
code
Sub
code
Title
Fusing section (lower) low
temperature trouble (HL2)