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Control specifications
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1. Temperature control
Settable range䋨㷄䋩 : -50㷄 ~ -90㷄
(For a maximum temp operation, when you input “99”, the chamber temperature will
be set to -99㷄.)
Chamber temperature display range: -180㷄 ~ +50㷄
How to set chamber temperature: In TopScreen, press MENU key to step to setting mode.
Select ‘Temperature ‘column and set using figure input key.
Press MENU key and select ‘OK’ to memorize the value.
2. Error codes and alarms
(1) Error codes
Error 01: When a temp. sensor input voltage is higher than 2950mV, it diagnoses that temp. sensor is open
circuited.
Error 02: When a temp. sensor input voltage is lower than 25mV, it diagnoses that temp. sensor is short
circuited.
Error 03: When a comp. sensor A input voltage is higher than 2950mV, it diagnoses that comp. sensor A is
open circuited.
Error 04: When a comp. sensor A input voltage is lower than 25mV, it diagnoses that comp. sensor A is
short circuited.
Error 05: When a comp. sensor B input voltage is higher than 2950mV, it diagnoses that comp. sensor B is
open circuited.
Error 06: When a comp. sensor B input voltage is lower than 25mV, it diagnoses that comp. sensor B is
short circuited.
Error 07: When an AT sensor input voltage is higher than 2950mV, it diagnoses that AT sensor is open
circuited.
Error 08: When an AT sensor input voltage is lower than 25mV, it diagnoses that AT sensor is short
circuited.
Error 09: When an Alarm Test performs with battery switch is off position, “Error 09” is indicated on
TopScreen.
Error 10: When a comp. sensor is higher than +65㷄, “Error 10” is indicated on TopScreen.
Error 16: When a current in A circuit is abnormal, it diagnoses that fan motor A is locked.
Error 17: When a current in B circuit is abnormal, it diagnoses that fan motor B is locked.
Error 18: When self diagnosis is done between 2:00~3:00a.m. and a unit detects twice that A circuit is
abnormal, it diagnoses that A circuit is abnormal.
Error 19: When self diagnosis is done between 2:00~3:00a.m. and a unit detects twice that B circuit is
abnormal, it diagnoses that B circuit is abnormal.
(2) High temperature alarm
Condition: When display temperature deviates from current set temperature and reaches high temp.
alarm set temperature.
Action: Temp. indication blinks, buzzer sounds intermittently and remote alarm contact activates after
Alarm Delay time elapses. Press BUZZER key to stop buzzer sounding, however, remote alarm
contact remains active. Remote alarm contact still activates if the buzzer sounds again after
Alarm Delay time elapses. See page P.27 as for remote alarm operation.
Setting range:
䊶High temp. alarm set temp: Set temp+5㷄~+20㷄(Factory default = 10㷄)
䊶Alarm delay time: 1min.~99min. When it is set in “0”, alarm does not return. (Factory default = 30min.)
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Note) Chamber temperature is indicated and ALARM lamp blinks, but remote alarm contact does not
activate until a chamber temperature reaches to high temp. alarm setting range during pull down.
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