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6
TO SHUT UNIT OFF
(UNITS WITH ELECTRO--MECHANICAL
CONTROL)
FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
Do not turn off the electrical power to unit without first turning
off the gas supply. Should the gas supply fail to shut off or if
overheating occurs, shut off the gas valve to the unit before
shutting off the e lectrical supply. Make sure to apply lockout
tags.
!
WARNING
See Fig. 1. for location of gas valve. Refer to Fig. 4 while
proceeding with the following steps:
Step 1 — Set room thermostat to lowest temperature setting and
set SYSTEM switch to OFF position.
Step 2 — Close the shutoff valve on the external gas supply
piping.
Step 3 — Turn off the electrical power supply to the unit and
install lockout tag.
Step 4 — Open the heat section access panel.
Step 5 — Move ON/OFF switch on the internal gas valve to the
OFF position.
Step 6 — Close the heat section access panel.
Step 7 — If unit is being shut down because of a malfunction,
call your dealer as soon as possible.
If unit is being shut down because the heating season has ended,
restore electrical power to the unit to ensure operation of the
cooling system during the cooling season.
TO SHUT UNIT OFF
(UNITS WITH COMFORTLINK
t
CONTROL)
FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
Do not turn off the electrical power to unit without first turning
off the gas supply. Should the gas supply fail to shut off or if
overheating occurs, shut off the gas valve to the unit before
shutting off the e lectrical supply. Make sure to apply lockout
tags.
!
WARNING
See Fig. 1. for location of gas valve. Refer to Fig. 5 while
proceeding with the following steps:
Step 1 — Turn off the unit operation by using the Scrolling
Marquee to put the unit into Service Test mode. The Scrolling
Marquee is located on the front of the unit control box behind the
control box and compressor access door. (See Fig. 6.) Thermostat
inputs and remote network commands are ignored when Service
Test mode is ON.
NOTE: A password may be required to change Service Test
values, depending on previous settings configured in the unit.
Default password is “1111.”
a. Press the ESCAPE key until a blank screen is shown.
b. Use the arrow keys to scroll the red LED on the display
to the “Service Test” position and press ENTER.
c. The control will display the Field Service Test Mode
(TEST) setting. Press ENTER once to select the TEST
setting for configuration. Press ENTER again for “OFF”
to begin flashing.
d. Use the arrow keys to change the configuration from
“OFF” to “ON,” then press ENTER to save the setting.
Step 2 — Close the shutoff valve on the external gas supply
piping.
Step 3 — Turn off the electrical power supply to the unit and
install lockout tag.
Step 4 — Open the heat section access panel.
Step 5 — Move ON/OFF switch on the internal gas valve to the
OFF position.
Step 6 — Close the heat section access panel.
Step 7 — If unit is being shut down because of a malfunction,
call your dealer as soon as possible. If unit is being shut down
because the heating season has ended, restore electrical power to
the unit to ensure operation of the cooling system during the
cooling season.
48PD, 48PG