Maintenance
40
SS-SVX002B-EN
Note:
The yellow LED may illuminate during initial start-
up but it doesn’t necessarily mean the cylinder
needs to be replaced.
“Humidifier Cylinder Replacement,” p. 41
humidifier operator’s manual supplied under separate
cover for detailed instructions on changing the cylinder.
Condensate Pump
The condensate pump should be inspected semi- annually
and cleaned:
•
Ensure that the float works freely.
•
Wipe the float with a wet cloth and detergent to remove
debris.
•
Clean the tank bottom.
•
Check that the discharge line is open and water can
pass through it freely.
Condenser
For air-cooled condensers, clean the condenser coil of all
debris that will inhibit airflow. This can be done with
compressed air or with a commercial coil cleaner. Check
for bent or damaged coil fins and repair as necessary.
On outdoor units in winter, do not permit snow to
accumulate on or around the condensing unit. Check all
refrigerant lines and capillaries for vibration isolation and
support as necessary. Check all refrigerant and coolant
lines for signs of leaks.
Field Service
WARNING
Confined Space Hazards!
Failure to follow instructions below could result in
death or serious injury. Do not work in confined spaces
where refrigerant or other hazardous, toxic or
flammable gas may be leaking. Refrigerant or other
gases could displace available oxygen to breathe,
causing possible asphyxiation or other serious health
risks. Some gases may be flammable and or explosive.
If a leak in such spaces is detected, evacuate the area
immediately and contact the proper rescue or response
authority.
WARNING
Refrigerant under High Pressure!
Failure to follow instructions below could result in an
explosion which could result in death or serious injury
or equipment damage. System contains refrigerant
under high pressure. Recover refrigerant to relieve
pressure before opening the system. See unit
nameplate for refrigerant type. Do not use non-
approved refrigerants, refrigerant substitutes, or
refrigerant additives.
Note:
Do not attempt to make repairs without the proper
tools.
It may be necessary to perform repairs on the A/C system.
If field repairs are necessary, the following procedures
apply:
Leak Detection
Several methods can be used to detect a leak in the
refrigeration system. The most modern and easiest
method is to use an electronic leak detector. Follow the
manufacturer’s directions and any leak can be quickly
located. A second method is to use soap bubbles.
Apply a solution of soapy water with a brush or sponge to
the joints and connections in the refrigerant lines. A leak in
the lines will cause bubbles to form.
Leak Repair
When a leak is located, properly reclaim the remaining
refrigerant charge before beginning repairs. Adjacent
piping must be thoroughly cleaned by removing all paint,
dirt and oily film. Use a wire brush, sand cloth or
sandpaper and wipe the area with clean, dry cloths.
Protect nearby parts from heat damage by wrapping with
water-soaked cloths.
Refrigerant Piping
When replacing components within the cabinet of the unit,
the following consumable materials are recommended:
Use SIL-FOS alloy for copper-to-copper (piping discharge
or suction line repairs). Silver soldier (Stay- Silv #45) and
flux are to be used on copper-to-brass or copper-to-steel
repairs. For liquid line repairs at the drier, strainer, sight
glass, or expansion valve, use a 95% tin to 5% antimony
solder with flux.
When component replacement is complete, remove all
traces of flux. After any repair, pressure check the system
to ensure there are no leaks prior to recharging the system.
General Common Repairs/ Component
Replacement
Compressor Failure
The compressor is the most important component of the
air conditioner. Numerous safety devices are provided to
protect the compressor from failing.
If a compressor failure has occurred, determine whether it
is an electrical or a mechanical failure. An electrical failure
will be indicated by the distinct pungent odor once the
system has been opened. If a burnout has occurred, the oil
will be black and acidic. A mechanical failure will have no
burned odor and the motor will attempt to run, an
abnormal or excessive noise may be present.
An analysis of the oil is the only way to determine the
proper procedure for cleaning the refrigerant system. Acid
test kits are available from several manufacturers for
measuring the acid level in the oil. These are capable of
