Service manual

28
All LCD and LED
return to lit status
All
LCD and LED lit
Fan manual
operation
LED
segments lit
Microprocessor
version E2ROM
model display
Model
code indication
“FF” displayed for E2PROM error
E2PROM model
information
E2PROM version
Microprocessor
version
※ ※
0
1
2
3
4
Examples
Higher flow .......HUMIDITY SET switch
Lower flow .......Operation MODE switch
Flow rate indication
(3 hexadecimal digits)
Flow rate: Hexadecimal × 16 µS
Error (failure)
P10 connector out of position
Room temperature thermistor blowout
Check the P10 connection.
Check the room temperature and humidity
sensor board.
Corrective action
Room temperature thermistor short
Room temperature and humidity
sensor board failure
P11 connector out of position
Tube temperature thermistor blowout
Check the P11 connection.
Check the tube temperature thermistor.
Tube temperature thermistor short
Tube temperature sensor failure
Microprocessor failure
RAM error
Replace the main board.
Frequency determination error
Check the receptacle and the 100 V
power supply (replace the main and power
supply boards).
Watchdog timer error
Replace the main board (replace the main and
power supply boards).
Compressor
Check blowing performance.
Check the tube temperature thermistor.
Check the compressor operating noise.
Indication
(Timer display)
E0
E1
E7
Frequency determination error
Watchdog error
RAM error
Check power plug and 100V power supply
(Try replacing main and power supply boards)
Replace main board
(Try replacing main and power supply boards)
Replace main board
Compressor Check blowing performance
Check tube temperature thermistor
Check compressor operating noise
All Mode
lamps lit
All timer
lamps lit
E8
A1
A2
A6
P4
E16SE16SX
7.4 Error Indications and Corrective Actions
7.5 Self-Test Program and Execution Procedure
(1) LCD and fan tests
●Start: Simultaneously press operation MODE and HUMIDITY SET switches four times with the power
off. Press the operation switch within 2 seconds.
●Mode selection: Use the timer switch to change the diagnosis mode.
E16SX