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6. MAINTENANCE PROCEDURES
Daily Inspection & Maintenance
● Be sure that main power switch (ELB) is OFF before daily inspection and maintenance.
● Perform inspections and maintenance when chamber interior is at room temperature.
● Never attempt to disassemble unit.
● Clean unit using soft damp cloth.
● Never use benzene, paint thinner, scouring powder, scrubbing brush or other abrasives and
solvents to clean unit. Superficial damage and/or discoloration, as well as deformity to some
components may result.
Inspect monthly.
● Inspect main power switch (ELB) ON and OFF function.
・Prepare unit for inspection by connecting power cable to a facility outlet or terminal.
・Confirm that main switch (ELB) is “OFF” then, turn main switch (ELB) back “ON”.
・With the main switch “ON”, depress the test button on the main switch (ELB) using a ball-point pen
or other fine-tipped object. If main switch (ELB) shuts off, it is functioning normally.
● Test Independent Overheat Prevention Device (IOPD).
・Run unit in constant temperture mode and allow temperature to stabilize.
・Set the activation temperature for the IOPD to approximately 5C below chamber temperature.
・If overheating prevention device is functioning normally, heater will shut off within few seconds and
error code “Er07” will appear in the upper display. An alarm will also sound and ERROR lamp will
illuminate.
Main power switch (ELB) and overheat prevention device must be inspected, as
prescribed above, prior to every instance of extended or overnight operation.
Replacing the HEPA filter
Check differential pressure gauge (filter gauge).
・ If the gauge indicator is in the yellow zone nearing red,
while unit is operating at room temperature, replace the
HEPA filter.
Even with the indicator still in the yellow zone, the HEPA
filter capacity is diminished. Chamber airflow and/or
temperature characteristics are also affected. Replacing
the HEPA filter sooner, rather than later, is therefore
recommended
・ Utmost care must be taken when replacing HEPA filter
and should be done by Yamato or other certified
technician.
◆Contact local Yamato dealer or Yamato Customer Service Center for service or questions.
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