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WSHP-SVX04A-EN 33
WARNING
Hazardous Service
Procedures!
The maintenance and trouble
shooting procedures recommend-
ed in this section of the manual
could result in exposure to electri-
cal, mechanical or other potential
safety hazards. Always refer to
the safety warnings provided
throughout this manual concern-
ing these procedures. When possi-
ble, disconnect all electrical
power including remote discon-
nects before servicing. Follow
proper lockout/tagout procedures
to ensure the power can not be in-
advertently energized. When nec-
essary to work with live electrical
components, have a qualified li-
censed electrician or other indi-
vidual who has been trained in
handling live electrical compo-
nents per these tasks. Failure to
follow all of the recommended
safety warnings provided, could
result in death or serious injury.
Preliminary Trouble Inspection
If operational difficulties are encoun-
tered, be sure to perform the prelimi-
nary checks before referring to the
troubleshooting chart on page 34.
• Verify that the unit is receiving elec-
tric supply power.
• Ensure that the fuses in the fused
disconnect are intact.
After completing the preliminary
checks, inspect the unit for other obvi-
ous problems such as leaking connec-
tion, broken or disconnected wires,
etc. If everything appears to be in or-
der, but the unit still fails to operate
properly, refer to the troubleshooting
chart on page 34.
General Operation
The standard model is designed for in-
door installation. When the unit is in-
stalled in an unconditioned space, the
unit may not start in cool weather (ap-
proximately 45°F). It may then be nec-
essary to start the unit in the cooling
mode for three to five minutes. The
unit may then be shut-off (there will be
a two minute time-out of the unit), and
restarted in the heating mode.
Like any other type of mechanical
equipment, the unit performs best
when it is well maintained.
Operation with a Conventional
Thermostat
The unit is equipped with safety con-
trols, including high pressure control
and low pressure control to shut off
the compressor under abnormal pres-
sure conditions. If the safeties shut off
the compressor, a lockout relay pre-
vents short cycling from the abnormal
condition. When conditions are cor-
rected, the lockout control can be reset
by setting the thermostat system
switch to OFF wait a few minutes for
the system pressure to equalize, and
then return to HEAT or COOL. If the
condition continues, an authorized
service person should check out the
unit.
Troubleshooting