UNT-SVX041D-EN
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Routine Maintenance
Safety
•
Always isolate the fan coil unit electrically before
removing the front access panel. Do this by opening
the circuit breaker (or other switching device) on the
distribution panel in the suite. There is a high risk of
electrocution if the unit is improperly isolated. If in
doubt have a qualified electrician perform the service
work.
•
Ensure that the fan has stopped rotating before
proceeding to work within the unit.
•
If the unit is equipped with a fuse or circuit breaker, do
not change out either of these devices with ones of a
higher Amp rating. The purpose of a fuse or circuit
breaker is to protect the power wiring to the unit. The
fuse class, voltage, and amp ratings are marked on the
electrical wiring diagram.
•
Take care when working inside the unit. Sheet metal
components may have sharp edges.
•
If the black acrylic coating on the fiberglass cabinet
liner is damaged, it must be patched to prevent
fiberglass particles entering the air stream.
Maintenance Checklist
The following components do not require routine
maintenance:
•
Fan, fan motor, control valve, electric heater, units with
electric heat, thermostat.
Note:
Fan motors have sealed bearings and do not
require additional lubrication.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized.
WARNING
Rotating Components!
Failure to disconnect power before servicing could
result in rotating components cutting and slashing
technician which could result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized.
CAUTION
Sharp Edges!
Failure to follow instructions below could result in
minor to moderate injury.
The service procedure described in this document
involves working around sharp edges. To avoid being
cut, technicians MUST put on all necessary Personal
Protective Equipment (PPE), including gloves and arm
guards.
Table 29. Maintenance checklist
Frequency
Maintenance
Every three months
• Replace filter. The filter can be one of two types: a cardboard framed type or a wire frame with filter media attached.Under certain
operating conditions, it may be necessary to change or clean the filter more frequently to obtain maximum unit performance.
For flush mounted panels, remove panel by rotating fastener head with a 1/4 turn. Pull the top edge of the panel forwards
and unhook the bottom edge. Slide out the filter. Fit a new filter and replace the panel.
For hinged panels, open the door forward. The filter is now accessible and is removed by sliding it upwards out of the
channels behind the door.
Annually (before the
start of the cooling
season)
• Remove the return air/access panel from the wall. Remove the sheet metal screws which secure the panel that shields the fan
assembly. Pull the shield panel sharply downward and remove.
• Vacuum the drain pan and check that the drain outlet is not blocked. Pour water into the pan and check that it drains quickly. If
it appears to be partly blocked, remove and clean the drain hose beneath the pan.
• If the coil surface is dirty, vacuum the surface which faces the room. Take care not to damage the aluminium fins on the coil. If
the fins are flattened, the performance of the unit will be reduced
• Inspect the surface of the cabinet liner for evidence of dampness. The liner should be completely dry in all areas. Vacuum excessive
dust from the liner, taking care not to damage the black acrylic coating on the liner. Do not run the unit if the liner is damp as
this can promote mold growth. Determine the cause of the dampness. If there is evidence of mold growth it might be necessary
to replace part or all of the liner. If in doubt consult a remediation specialist.
• Replace the thermostat battery if it is a seven-day programmable type
