Trane EXWA, Руководство по установке

Страница: 27 / 31

WSHP-SVX02A-EN 27
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 28.
• 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 28.
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. The
freeze protection thermostat should
also be checked as it may be adversely
affected by ambient temperature.
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,
low pressure control and a freeze pro-
tection thermostat, set to shut off the
compressor under abnormal tempera-
ture or pressure conditions. If the safe-
ties shut off the compressor, a lockout
relay prevents short cycling from the
abnormal condition. When conditions
are corrected, the lockout control can
be reset by setting the thermostat sys-
tem 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