Only service personnel with qualication certicate can undertake service work.
WARNING
All power circuits shall be cut o before connecting terminal devices.
Shut down the device and shut o power switch before washing or maintaining; otherwise, electric shock may
ensue; do not touch movable and rotary parts.
Do not wash the device with clean water; otherwise, electric shock ensues.
When wire control registers for screen cleanup and screen indicator ashes (cleanup time reached), clean up air
screen. The indication appears when preset runtime comes to an end.
CAUTION
Heat exchange device and air screen shall be frequently cleaned up and replaced.
Cleanup job shall be done at least once per year (applicable to normal oce conditions). (Frequent cleanup
shall be done when necessary).
In case of serious air pollution in places where the unit is installed, intensify cleanup eorts.
In case of dust and dirt stubbornly denying cleanup eorts, replace air screen and heat exchange device (all
replacements shall be alternative ttings).
Please wear gloves when conducting cleanup job lest injury ensues. Mind your steps especially when working
aloft.
CAUTION
Do not wash air screen with water hotter than 40°C; otherwise, screen may lose color or get deformed.
Do not place air screen near re source; otherwise, screen may catch re.
Do not use gasoline, diluent or other chemical solvents; otherwise, screen may lose color or get deformed.
Do not remove air screen except for cleaning purposes; otherwise, fault may ensue.
WARNING
In case the handle of heat exchange device gets damaged during cleaning, please replace heat exchange
device; otherwise, it may fall o.
Maintenance
13
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