268721-YIM-C-0908
18
Johnson Controls Unitary Products
Maintenance
Normal Maintenance
Periodic maintenance consists of changing or cleaning filters
and general cleaning of the outdoor coil.
FILTERS -
Inspect once a month. Replace Disposable or clean
Permanent Type as necessary. DO NOT replace Permanent
Type with Disposable.
MOTORS -
Indoor and outdoor fan motors are permanently
lubricated and require no maintenance.
OUTDOOR COIL -
Dirt should not be allowed to accumulate on
the outdoor coil surface or other parts in the air circuit. Cleaning
should be as often as necessary to keep the coil clean. Use a
brush, vacuum cleaner attachment, or other suitable means. If
water is used to clean the coil, be sure that the power to the unit
is shut off prior to cleaning.
Troubleshooting
G & W
ON
FAN INSTANT ON
HEATER BANK 1, 2 & 3 ELEC. HEAT INSTANT ON
HEATER BANK 4, 5 & 6 ELEC. HEAT 10 SEC. DELAY ON
OFF
HEATER BANK 4, 5 & 6 ELEC. HEAT INSTANT OFF
HEATER BANK 1, 2 & 3 ELEC. HEAT SEC. DELAY OFF
FAN 10 SEC. DELAY OFF
G & Y & W
ON
FAN INSTANT ON
COMPRESSOR AND OUTDOOR FAN INSTANT ON
SYSTEM OPERATES IN HEATING
HEATER BANK 1, 2 & 3 ELEC. HEAT INSTANT ON
HEATER BANK 4, 5 & 6 ELEC. HEAT 10 SEC. DELAY ON
OFF
COMPRESSOR AND OUTDOOR FAN INSTANT OFF
HEATER BANK 4, 5 & 6 ELEC. HEAT INSTANT OFF
HEATER BANK 1, 2 & 3 ELEC. HEAT SEC. DELAY OFF
FAN 60 SEC. DELAY OFF
W
ON
FAN INSTANT ON
HEATER BANK 1, 2 & 3 ELEC. HEAT INSTANT ON
HEATER BANK 4, 5 & 6 ELEC. HEAT 10 SEC. DELAY ON
OFF
HEATER BANK 4, 5 & 6 ELEC. HEAT INSTANT OFF
HEATER BANK 1, 2 & 3 ELEC. HEAT SEC. DELAY OFF
FAN 10 SEC. DELAY OFF
Table 15: Thermostat Signals (Three Phase Units) (Continued)
Signal
State
Board Function
Prior to any of the following maintenance procedures,
shut off all power to the unit, to avoid personal injury.
Exercise care when cleaning the coil so that the coil fins
are not damaged.
Do not permit the hot condenser air discharge to be
obstructed by overhanging structures or shrubs.
Troubleshooting of components necessarily requires
opening the electrical control box with the power
connected to the unit. Use extreme care when working
with live circuit! Check the unit nameplate for the correct
range before making any connections with line
terminals.
The wire number or color and terminal designations
referred to may vary. Check the wiring label inside the
control box access panel for the correct wiring.
