Read Sharp MX-M850 (serv.man38) Service Manual online
MX-M1100 SELF DIAG AND TROUBLE CODE 8 – 22
H2-02
Lower thermistor open (PRTH)
H2-03
Non-contact main thermistor
(reparation) open (RTH1-d_C)
(reparation) open (RTH1-d_C)
H3-00
Non-contact main thermistor high
temperature trouble (RTH1_d)
temperature trouble (RTH1_d)
H3-01
Sub thermistor high temperature
trouble (RTH2)
trouble (RTH2)
H3-02
Lower thermistor high temperature
trouble (PRTH)
trouble (PRTH)
H4-00
Non-contact main thermistor low
temperature trouble (RTH1-d)
temperature trouble (RTH1-d)
H4-01
Sub thermistor low temperature
trouble (RTH2)
trouble (RTH2)
Detail
The thermistor is open
Section
PCU
Cause
Thermistor trouble, control PWB trouble.
Fusing section connector trouble.
AC power source trouble.
The fusing unit is not installed.
Fusing section connector trouble.
AC power source trouble.
The fusing unit is not installed.
Check &
Remedy
Remedy
Check connection of the harness and the connector
from the thermistor to the control PWB.
from the thermistor to the control PWB.
Detail
The thermistor is open
Section
PCU
Cause
Thermistor trouble, control PWB trouble, fusing section
connector connection trouble, AC power trouble.
Fusing unit not installed.
connector connection trouble, AC power trouble.
Fusing unit not installed.
Check &
Remedy
Remedy
Check the harness and the connector between the
thermistor and the control PWB.
thermistor and the control PWB.
Detail
The fusing temperature in the PWB exceeds the
specified level
specified level
Section
PCU
Cause
Thermistor trouble, control PWB trouble.
Fusing section connector connection trouble.
AT power source trouble
Fusing section connector connection trouble.
AT power source trouble
Check &
Remedy
Remedy
Check blinking of the heater lamp with Sim. 5-2. If the
heater lamp blinks normally, check the thermistor and
the harness.
Check the thermistor input circuit section of the control
PWB.
It the lamp keeps ON, check the AC PWB, the control
PWB lamp control circuit.
Cancel the trouble with Sim. 14.
heater lamp blinks normally, check the thermistor and
the harness.
Check the thermistor input circuit section of the control
PWB.
It the lamp keeps ON, check the AC PWB, the control
PWB lamp control circuit.
Cancel the trouble with Sim. 14.
Detail
The fusing temperature in the PWB exceeds the
specified level
specified level
Section
PCU
Cause
Thermistor trouble, control PWB trouble.
Fusing section connector connection trouble.
AT power source trouble
Fusing section connector connection trouble.
AT power source trouble
Check &
Remedy
Remedy
Check blinking of the heater lamp with Sim. 5-2.
If the heater lamp blinks normally, check the thermistor
and the harness.
Check the thermistor input circuit section of the control
PWB.
It the lamp keeps ON, check the AC PWB, the control
PWB lamp control circuit.
Cancel the trouble with Sim. 14.
If the heater lamp blinks normally, check the thermistor
and the harness.
Check the thermistor input circuit section of the control
PWB.
It the lamp keeps ON, check the AC PWB, the control
PWB lamp control circuit.
Cancel the trouble with Sim. 14.
Detail
The fusing temperature in the PWB exceeds the
specified level
specified level
Section
PCU
Cause
Thermistor trouble, control PWB trouble.
Fusing section connector connection trouble.
AT power source trouble.
Fusing section connector connection trouble.
AT power source trouble.
Check &
Remedy
Remedy
Check blinking of the heater lamp with Sim. 5-2.
If the heater lamp blinks normally, check the thermistor
and the harness.
Check the thermistor input circuit section of the control
PWB.
It the lamp keeps ON, check the AC PWB, the control
PWB lamp control circuit.
Cancel the trouble with Sim. 14.
If the heater lamp blinks normally, check the thermistor
and the harness.
Check the thermistor input circuit section of the control
PWB.
It the lamp keeps ON, check the AC PWB, the control
PWB lamp control circuit.
Cancel the trouble with Sim. 14.
Detail
The set temperature is not reached with the specified
time after turning on the power relay
time after turning on the power relay
Section
PCU
Cause
Thermistor trouble. Heater lamp trouble.
PCU PWB trouble. Thermostat trouble.
AC power source trouble.
Interlock switch trouble.
PCU PWB trouble. Thermostat trouble.
AC power source trouble.
Interlock switch trouble.
Check &
Remedy
Remedy
Check blinking of the heater lamp with Sim. 5-2.
If the lamp blinks normally, check the thermistor and the
harness.
Check the thermistor input circuit section of the PCU
PWB. If the lamp does not light up, check the heater
lamp and the thermostat for breakage.
Check the interlock switch.
Check the AC PWB and the PCU PWB lamp control
circuit.
Cancel the trouble with Sim. 14.
If the lamp blinks normally, check the thermistor and the
harness.
Check the thermistor input circuit section of the PCU
PWB. If the lamp does not light up, check the heater
lamp and the thermostat for breakage.
Check the interlock switch.
Check the AC PWB and the PCU PWB lamp control
circuit.
Cancel the trouble with Sim. 14.
Detail
The set temperature is not reached with the specified
time after turning on the power relay
time after turning on the power relay
Section
PCU
Cause
Thermistor trouble. Heater lamp trouble.
PCU PWB trouble. Thermostat trouble.
AC power source trouble.
Interlock switch trouble.
PCU PWB trouble. Thermostat trouble.
AC power source trouble.
Interlock switch trouble.
Check &
Remedy
Remedy
Check blinking of the heater lamp with Sim. 5-2.
If the lamp blinks normally, check the thermistor and the
harness.
Check the thermistor input circuit section of the PCU
PWB. If the lamp does not light up, check the heater
lamp and the thermostat for breakage.
Check the interlock switch.
Check the AC PWB and the PCU PWB lamp control
circuit. Cancel the trouble with Sim. 14.
If the lamp blinks normally, check the thermistor and the
harness.
Check the thermistor input circuit section of the PCU
PWB. If the lamp does not light up, check the heater
lamp and the thermostat for breakage.
Check the interlock switch.
Check the AC PWB and the PCU PWB lamp control
circuit. Cancel the trouble with Sim. 14.
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