CLEANING AND MAINTENANCE
CAUTION:
To avoid the possibility of electric shock,
before performing any cleaning and maintenance op-
erations always turn off power to the system by press-
ing the orange ON/OFF button on the remote control-
ler. Turn off the outdoor disconnect switch located near
the outdoor unit. If the indoor unit is on a separate switch,
be sure it is also disconnected.
For proper system operation, perform the cleaning and main-
tenance operations in Table 6.
I. LUBRICATION
The indoor-fan automatic air sweep motor, and the outdoor
fan motor are factory lubricated and require no oiling.
II. TO INSTALL OR REPLACE REMOTE CONTROLLER
BATTERIES
CAUTION:
Do not drop the remote controller — dam-
age to the device may result. Avoid getting the control-
ler wet.
NOTE:
Before replacing the batteries, note that the remote
controller signal can be affected if electronic fluorescent
lights are installed nearby. The batteries may not need to be
replaced. If you suspect this is the problem, consult your
distributor.
Batteries should be replaced once a year. Use 2 batteries (1.5 v,
dc-type, AAA alkaline batteries). Never use old or recharged
batteries together with new ones.
To replace batteries:
1. Slide the battery cover off from the back of the remote
controller. See Fig. 21.
2. Insert the 2 batteries in accordance with the markings
on the remote controller, so that the poles are correct (+
and −).
3. Press the RST button using an instrument screw-
driver or similar small, pointed tool.
4. Replace the cover securely.
It is time to replace the remote controller batteries when the
remote controller function becomes irregular, or the system
no longer responds to commands given close to the unit.
When shutting down the system for an extended period of
time, it is advisable to remove the batteries.
Consult distributor if any other equipment is turned on or
shows signs of disrupted operation if you use the wireless re-
mote controller, or if the system is turned on or shows signs
of disrupted operation when the remote controller of any other
equipment is used.
III. TO SET THE CURRENT TIME
1. Press the TA button (located on the back of the remote
controller; see Fig. 22) with an instrument screwdriver
or similar small, pointed tool, and the current time in-
dication symbol flashes.
NOTE:
That the controller comes preset from the factory set
for 6:00 a.m.
2. Set the current time with the hour and minute buttons
on the front of the remote controller (see Fig. 22) while
the current time indication is flashing. Note that a.m.
and p.m. are also indicated as the times are scrolled
through.
3. Press TA again. The flashing will stop and the current
time will be reset to the new setting.
IV. TO REMOVE AND CLEAN OR REPLACE AIR FILTERS
CAUTION:
Operating your system with dirty air fil-
ters may damage the indoor unit and can also cause re-
duced cooling performance, intermittent system opera-
tion, frost build-up on the indoor coil, and blown fuses.
Inspect and clean or replace the air filters monthly.
A. To Remove Air Filters
1. Open fan coil unit front panel (lift). See Fig. 23.
2. Pull the filters down to remove.
Table 6 — Cleaning and Maintenance Schedule
TASK
MONTHLY
QUARTERLY
YEARLY
INDOOR UNIT
Clean Air Filters
X
Clean Drain Pipe
X
Clean Condensate Drain Pan
X
Replace Batteries in the Remote Controller*
X
Clean Indoor Unit Front Panel
X
OUTDOOR UNIT
Clean the Fins From Outside
X
Open the Unit and Clean Fins Inside
X
Remove Dust From Electrical Parts
X
Check Electrical Connections are Tight
X
Clean Outdoor Fan
X
Check that Outdoor Fan Assembly is Tight
X
Clean Drain Pan
X
NOTE: Maintenance procedures for the outdoor unit are in the 538A, 538B, and 538S installation instructions.
EMER — Emergency Mode
Fig. 20 — Slide Switch
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