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MISWIRED MODULE INDICATION
Green LED is not on, module does not power up
Green LED Intermittent, module powers up only
when compressor runs
TRIP LED is on but system and compressor check
OK
TRIP LED and ALERT LED
flashing together
ALERT Flash Code 3 (Compressor Short Cycling)
displayed incorrectly
ALERT Flash Code 5 or 6 (Open Circuit, Missing
Phase) displayed incorrectly
Alert Flash Code *
(Welded Contactor)
displayed incorrectly
Outdoor Fans
Each fan is supported by a formed-wire mount bolted to the
fan deck and covered with a wire guard. Fan motors have
permanently lubricated bearings.
1. Shut off unit power supply. Install lockout tag.
2. Remove outdoor fan assembly (grille, motor, and
fan).
3. Loosen fan hub setscrews.
4. Adjust fan height as shown in Fig. 31.
5. Tighten setscrews to 84 in.-lb (949 N-cm).
6. Replace outdoor fan assembly.
3.6 mm +0/0/-0.8
Fig. 31 — Outdoor Fan Blade Position
Lubrication
FAN MOTORS
The fan motors have sealed bearings. No provisions are
made for lubrication.
COMPRESSOR
The compressor has its own oil supply. Loss of oil due to a
leak in the system should be the only reason for adding oil
after the system has been in operation.
Outdoor Coil Maintenance and Cleaning
Recommendation
Routine cleaning of coil surfaces is essential to maintain
proper operation of the unit. Elimination of contamination
CHS-072-121-01SI
Table 18 — CADM Troubleshooting
RECOMMENDED TROUBLESHOOTING ACTION
Determine if both R and C module terminals are connected. Verify voltage in present at
module's R and C terminals.
NOTE: The CADM requires a constant nominal 24VAC power supply. The wiring to the
module's R and C terminals must be directly from the control transformer. The module
cannot receive its power from another device that will interrupt the 24VAC power supply.
See Fig. A-G, the CHS Wiring Diagrams.
Determine if R and Y terminals are wired in reverse. Verify module's R and C terminals
have a constant source. See "NOTE" above for details on R and C wiring.
Verify Y terminal is wired properly per the CHS wiring diagram (see Fig. A-G). Verify voltage
at contactor coil falls below 0.5VAC when off. Verify 24VAQC is present across Y and C
when thermostat demand signal is present.
If not, R and C are reverse wired.
Verify R and C terminals are supplied with 19-28VAC.
Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor coil
falls below 0.5VAC when off.
Check that compressor T1 and T3 wires are through module's current sensing holes. Verify
Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor coil falls
below 0.5VAC when off.
Determine if module's Y terminal is connected. Verify Y terminal is connected to 24VAC at
contactor coil. Verify 24VAC is present across Y and C when thermostat demand signal is
present. If not, R and C are reverse wired. Verify voltage at contactor coil falls below
0.5VAC when off.
and removal of harmful residues will greatly increase the life
of the coil and extend the life of the unit. The following main-
tenance and cleaning procedures are recommended as
part of the routine maintenance activities to extend the life of
the coil.
REMOVE SURFACE LOADED FIBERS
Surface loaded fibers or dirt should be removed with a vac-
uum cleaner. If a vacuum cleaner is not available, a soft
non-metallic bristle brush may be used. In either case, the
tool should be applied in the direction of the fins. Coil surfac-
es can be easily damaged (fin edges can be easily bent
over and damage the coating of a protected coil) if the tool
is applied across the fins.
NOTE: Use of a water stream, such as a garden hose,
against a surface loaded coil will drive the fibers and dirt into
the coil. This will make cleaning efforts more difficult. Sur-
face loaded fibers must be completely removed prior to us-
ing low velocity clean water rinse.
PERIODIC CLEAN WATER RINSE
A periodic clean water rinse is very beneficial for coils that
are applied in coastal or industrial environments. However, it
is very important that the water rinse is made with very low
velocity water stream to avoid damaging the fin edges.
Monthly cleaning as described below is recommended.
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this caution may result in personal injury
or equipment damage.
Only approved cleaning is recommended.
Specifications subject to change without notice.
CAUTION
33
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