Control Module Service; Oil Dip Tube Assemblies; Replacement Modules; Condenser Fan Motors - Carrier 38APS025 Manual

Removing Oil — If the oil level is determined to be too high,
oil can be removed from the Schrader fitting on the compres-
sors for the single and trio compressor circuits. Remove oil
from the Schrader fitting on the oil equalizer tube for the tan-
dem compressor circuits.
If the complete oil charge must be removed, an oil dip tube
assembly is required. The oil dip tube assembly is inserted into
the compressor oil sight glass assembly. Oil dip tube assem-
blies are available through Carrier Replacement Components.
See Table 69.
Table 69 — Oil Dip Tube Assemblies
CARRIER PART NUMBER
30RA680018
30RA680041
30RA680040
30RA680039
Leaving the oil dip tube assembly in place is not recom-
mended. See the section Replacing the Sight Glass below for
installation instructions.

COMPRESSOR AND OIL EQUALIZER LINE SIGHT

GLASSES — Compressors in single and tandem circuit ar-
rangements have oil sight glasses located on the compressors
(Fig. 175 and 176).
Replacing the Sight Glass — The sight glass seal is accom-
plished with an O ring. Do not reuse O ring.
To install or replace the compressor sight glass, torque the
sight glass to 50 to 58 ft-lb (68 to 78 N-m).
If the sight glass is on the oil equalizer line, torque the sight
glass to 25 to 30 ft-lb (34 to 40 N-m). Be sure to use a back-up
wrench to install the sight glass on the oil equalizer line.

Control Module Service

LOSS OF COMMUNICATION — Loss of communication
issues can be found on the Carrier Comfort Network
or Local Equipment Network (LEN). See the specific section
below.
Carrier Comfort Network (CCN) — Loss of communication
with CCN will result in the unit entering stand-alone mode. In
this case check CCN wiring to the machine. The CCN com-
munications with external control systems can be affected by
high frequency electrical noise generated by the Motormaster
V control. Ensure unit is well grounded to eliminate ground
currents along communication lines.
Local Equipment Network (LEN) — Loss of communica-
tions with the LEN is typically an internal wiring issue or a
shorted input or output to a control module. Check the wiring,
LEN wiring and input and output wiring.
CONTROL MODULE REPLACEMENT —
fortLink replacement modules are shown in Table 70. If the
Main Base Board (MBB) has been replaced, verify that all con-
figuration data is correct. Follow the Configuration mode table
and verify that all items under sub-modes UNIT, OPT1 and
OPT2 are correct. Any additional field-installed accessories or
options (RSET, SLCT sub-modes) should also be verified, as
well as any specific time and maintenance schedules.
COPELAND COMPRESSOR
USAGE
ZP/ZPD103,120,137,154,182
ZP235
ZP236, 296
ZP295
® (CCN)
The Com-
Table 70 — Replacement Modules
MODULE
Main Base Board (MBB)
Scrolling Marquee Display
Energy Management Module
(EMM)
Navigator Display
Compressor Expansion
Board (CXB)
Auxiliary Board (AUX)
Refer to the Start-Up Checklist for 38AP units (completed
at time of original start-up) found in the job folder. This infor-
mation is needed later in this procedure. If the checklist does
not exist, fill out the current information in the Configuration
mode on a new checklist. Tailor the various options and config-
urations as needed for this particular installation.
Electrical shock can cause personal injury. Disconnect all
electrical power before servicing.
1. Check that all power to unit is off. Carefully disconnect
all wires from the defective module by unplugging its
connectors.
2. To remove the defective module, remove its mounting
screws with a Phillips screwdriver, and remove the mod-
ule from the control box. Save the screws for later use.
3. Verify that the instance jumper (MBB) or address switch-
es (all other modules) exactly match the settings of the
defective module.
NOTE: Handle boards by mounting standoffs only to
avoid electrostatic discharge.
4. Package the defective module in the carton of the new
module for return to Carrier.
5. Mount the new module in the unit's control box using a
Phillips screwdriver and the screws saved in Step 2.
6. Reinstall all module connectors. For accessory Naviga-
tor™ device replacement, make sure the plug is installed
at LVT in the LEN connector.
7. Carefully check all wiring connections before restoring
power.
8. Verify the Enable/Off/Remote contact switch is in the
OFF position.
9. Restore control power. Verify that all module red LEDs
blink in unison. Verify that all green LEDs are blinking
and that the scrolling marquee or Navigator display is
communicating correctly.
10. Verify all configuration information, settings, set points
and schedules. Return the Enable/Off/Remote contact
switch to its previous position.
Condenser Fan Motors —
must be replaced, be sure to orient the motor properly in the
motor mount. For 38APD025-060 and 38APS025-050, orient
the motor plug toward the control box. Be sure the motor is se-
curely seated in the bearing cup at the bottom of the motor sup-
port. Be sure to form a drip loop in the power wiring prior to
connecting the power plug. See Condenser Fans on page 150
for proper fan placement.
149
REPLACEMENT PART NUMBER
(WITH SOFTWARE)
38AP501672
HK50AA031
30GT515218
HK50AA033
30GT515219
32GB500442E
WARNING
If a condenser fan motor