Carrier ThinLINE 69NT40-541 Installation instructions

Container Refrigeration
ANNUAL INSPECTION
For
ThinLINE 69NT40-541
PrimeLINE 69NT40-561
Container Refrigeration Units
62-10327 Rev A

ANNUAL INSPECTION
For
ThinLINE 69NT40-541
PrimeLINE 69NT40-561
Container Refrigeration Units
© 2017 Carrier Corporation ●Printed in USA June 2017

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PURPOSE
This manual has been written to assist owners and operators of Carrier
Transicold MicroLink equipment in obtaining the maximum operating
life from the equipment. It is written as an annual maintenance guide for
ThinLINE and PrimeLINE units and it is recommended that all units are
serviced with these procedures annually to obtain maximum operating
time from the equipment.
This manual is to be used in conjunction with the operations & service
manuals supplied with the equipment. Reference is made throughout
these pages to the operations & service manuals, which are posted
electronically on the Carrier Transicold Container website
http://www.carrier.com/container-refrigeration/en/worldwide/
Navigate to SERVICE & SUPPORT / LITERATURE / DOCUMENT
FINDER (Refer to Figure 1).
Figure 1 Carrier Transicold Container Website

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TOOLS REQUIRED
• Wrench set, 3/8 to 11/16
• Screwdrivers, flat, crosspoint (Phillips) and Pozi-Drive
• Torque wrench and sockets
• R134a Refrigerant leak detector
• Refrigeration gauge set
•Fincomb
• Megohm meter
• Multimeter, with voltage and resistance ranges
1. Before opening any panels for inspection or replacing any
electrical component in the system, apply the Lock Out/Tag
Out procedure, turn the unit off, open the unit circuit breakers
(CB1 and CB2 if equipped) and unplug the unit from main
power. Apply a locking device to ensure the system cannot
be plugged in during the maintenance procedure.
2. Carrier Transicold recommends wearing the appropriate
safety equipment such as safety glasses, gloves, etc.
whenever working on refrigeration equipment. Personnel
should be aware of the dangers inherent in servicing
equipment and assure they have read the relevant
operations and service manual for any unit.
3. To prevent damage to aluminum we recommend low
pressure fresh water cleaning. See evaporator coil section
for exception.
4. All local requirements for recovery and safe disposal of
refrigerants and oils must be followed.
WARNINGS AND NOTES
!

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UNIT MODEL NUMBER
The Model/Serial Number plate provides the unit model number
(Refer to Figure 2).
Figure 2 Model/Serial Number plate

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Figure 3 Evaporator Coil
Figure 4 Evaporator Fan Blade

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PHYSICAL INSPECTION
Rear of Unit
1. Remove the upper internal access panel, remove any debris, and
rinse the rear of unit with low pressure water. This includes the
evaporator coil (Refer to Figure 3).
2. Examine the evaporator motors for excessive end play. Slowly spin
the evaporator fan blade and feel for any bearing drag. Replace
bearing if required.
3. Examine the evaporator fan blade (Refer to Figure 4):
a. Check for cracking or wear. Replace fan blade as necessary.
b. Check that evaporator motor clamp brackets are secured.
4. Examine wire harnesses for any wear or damage and repair as
required. Ensure they are properly secured.
5. Examine defrost termination sensor (DTS) to ensure it is properly
secured to the unit and free of damage (Refer to Figure 5).
Replace or repair if necessary.
Figure 5 DTS Sensor
6. Examine sensors (i.e. return air, supply air, temperature recorder,
humidity and evaporator temperature sensors) for proper
positioning and security to unit. Examine sensor leads for damage,
replace or repair as necessary. Refer to the operation & service
manual for details on equipped sensors. Locating operation &
service manuals is explained in the Purpose section.

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7. Examine the drain cup, drain funnel and drain gutters. Repair as
required.
8. Clean the defrost drain lines using a low pressure water hose to
flush debris contained in the drain (Refer to Figure 6), and check
that the water is running freely to the outside.
Figure 6 Defrost Drain
9. Examine the TXV (Thermostatic Expansion Valve) or EEV
(Electronic Expansion Valve) for:
a. Refrigerant leaks (TXV or EEV).
b. Corrosion (TXV or EEV).
c. Proper insulation of the power head (TXV equipped,
refer to Figure 7).
d. Proper sensing bulb location and insulation (TXV
equipped, refer to Figure 7).
e. Electrical coil is correctly seated on the EEV (EEV
equipped, refer to Figure 8).
f. EEV coil boot is properly fitted over valve (EEV
equipped, refer to Figure 8).
g. Correct position of ETS1 and ETS2, securing tie is in
position and insulation is in place (Refer to Figure 9).

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Figure 9 ETS1 and ETS2
Figure 7 TXV Figure 8 EEV

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10. Examine the Evaporator coil:
a. Clean with low pressure water. If the evaporator coil is
noted to have green patina or white powder, it is recom-
mended to wash the coil with cleaner P/N NU4371-88.
Refer to TechLINE December 2010 issue for Evaporator
Section Cleaning.
b. Straighten any fin damage using the correct fin comb.
c. Check for any signs of leaks, and repair or replace
as necessary.
d. Check for any signs of corrosion, and repair or replace
as necessary.
NOTE
For certain cargos exposed to fumigation, it is recommended
after the trip to carefully wash all internal parts in the evapo-
rator section to avoid potential corrosion.
11. Examine the heaters and heater brackets for damage (Refer to
Figure 10 ). Ensure the heaters are properly positioned in the
retaining clips. Inspect wiring for correct connections, and repair if
required. Refer to
TechLINE June 2014 issue for heater
troubleshooting.
Figure 10 Heaters

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12. Examine the heater termination thermostat (HTT) for proper
positioning/damage (Refer to Figure 11). Replace as necessary.
Figure 11 Heater Termination Thermostat
13. Examine internal valves, solenoid coils, as required per unit model
number checking for proper positioning, physical damage, leaks or
corrosion. Clean, repair or replace as necessary. Refer to the
operation & service manual for details on equipped valves.
Locating operation & service manuals is explained in the Purpose
section.
14. Check channels or “T” bars on the floor and under the lower air
baffle, and kick plate, for cleanliness. Channels must be free of
debris for proper air circulation. Clean floor drains. Ensure that the
kick plate is correctly installed and in good condition for correct air
flow.
15. Check container panels, insulation, and door seals for damage.
Repair as required.
16. Check that USDA and interior communication sockets are clean,
dry and have the caps fitted.
17. Refit the upper access panel, and ensure all hardware is correctly
fitted. Replace as required.

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Front of Unit
Refer to the Warnings and Notes section in this manual before
proceeding with these instructions.
Remove All Exterior Panels
1. Examine unit for traces of oil residue. Leak check the unit, includ-
ing the compressor, using an electronic leak detector. Leaks are
typically found as a dirty/oily residue on compressor joints, high
pressure switch connection, pressure transducers (if fitted), piping
connections etc. Repair as required and clean the unit using low
pressure water, including the condenser coil.
2. Rust prevention and maintenance of painted surfaces (Refer to
Figure 12).
On-going corrosion maintenance is required. If corrosion is
found on any painted surface, remove corrosion, prime, and
paint using the following standard paint specifications.
Figure 12 Painted Surfaces
Paint Part Number
White P/N 36-00071-16
Blue P/N 76-00397-01
ThinLINE
PrimeLINE

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3. Ensure that the remote monitoring and interrogation sockets are
secure and free from damage and corrosion and caps are properly
tethered to the unit (Refer to
Figure 13 ). Repair/replace as required.
Figure 13 Interrogation Socket
4. Inspect the compressor and mounting plate for severe corrosion,
and check compressor shock mount for damage (cracks). Repair
or replace as necessary. Torque the mounting bolts according to
specifications in the operation & service manual. Locating
operation & service manuals is explained in the Purpose section.
5. Inspect the electrical control box (Refer to Figure 14):
a. Interior should be dry and free from signs of damage, over-
heating, corrosion, and moisture ingress. Repair any damage
to the control box door gasket.
b. Wire tie all loose wires.
c. Examine contacts for severe pitting, and replace contactor if
necessary.
d. Check to make sure wiring diagrams and schematics are pres-
ent and legible. Replace if missing or damaged.
e. Inspect the circuit breaker panel for damage and corrosion.
f. Inspect for damage and check tightness on all wire harnesses
and connections in control box, repair or replace as neces-
sary. Use of a Pozi drive (star) screwdriver is critical to assur-
ing the tightness of contactor wire screws.
g. Carry out a Megohm test on all motors and heaters. Replace
components if test is below the TechLINE minimum recom-
mendation or as specified by customer if higher. Refer to
TechLINE June 2014 issue for Megohm Readings.

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Figure 14 Electrical Control Box
6. Examine condenser motor and fan blade:
a. Check for cracking or wear on the fan blade. Replace as
necessary.
b. Check for proper fan positioning in the venturi, refer to the
operation & service manual for proper positioning instruc-
tions. Locating operation & service manuals is explained in the
Purpose section.
c. Slowly spin the condenser fan blade, feeling for any bearing
drag. Replace bearings as necessary.
d. Examine fan motor for corrosion, signs of overheating, or
physical damage. Repair or replace as necessary.
e. Check the CF mounting bracket for cracking where welded to
the bulkhead.
7. Examine condenser coil:
a. Check for any signs of leaks. Repair or replace as necessary.
b. Straighten any fin damage.
c. Clean the coil using a low pressure water hose. For a flat coil
(Refer to Figure 15) the preferred wash direction is top down,
for a C coil (Refer to Figure 16) inside to outside. In both
cases, direction is opposite to air flow direction.
d. Check for signs of excessive corrosion to the fins and tube
sheets. Replace as necessary.

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Figure 15 Flat Condenser Coil
Figure 16 C Condenser Coil
Flat condenser coil
C condenser coil

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8. Examine the flexible condensate defrost drain tube (Refer to
Figure 17). The tube should be undamaged and free from
blockage or debris. It may be necessary to remove the condenser
fan for complete access.
Figure 17 Condensate Defrost Drain Tube
9. Examine external valves, coils, sight glasses, pressure
transducers as equipped per the unit model number checking for
physical damage, leaks or corrosion. Clean, repair or replace as
necessary. Refer to the operation & service manual for details on
equipped valves. Locating operation & service manuals is
explained in the Purpose section.
10. Inspect filter/drier for excessive corrosion or physical damage, and
replace as required (Refer to Figure 18). Periodic paint touch up of
the filter may be required.
Figure 18 Filter/Drier
Model
/
Serial Number
p
late
Flexible condensate defrost drain tube

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11. Examine the water-cooled condenser (if equipped, refer to
Figure 19):
a. Periodic paint touch up of the water-cooled condenser may be
required.
b. Determine whether the water-cooled condenser is scaled.
Refer to the operation & service manual for specific details
on cleaning and maintenance of the water-cooled condenser.
Locating operation & service manuals is explained in the Pur-
pose section.
c. Inspect assembly for excessive corrosion or physical damage.
Repair or replace as necessary.
d. Check the water connections for damage and the collar on the
female fitting to ensure it moves freely.
Figure 19 Water-Cooled Condenser
Old design
New design

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12. Examine power cables:
a. Check the cable to make sure it is securely attached to the
unit and the clamp is in position.
b. Replace or repair the cable if damaged or crushed in any man-
ner. Replace the cable if more than one repair joint is found.
c. Replace the plug if pins are burned or pitted, or if locating lug
is missing (Refer to Figure 20).
d. Disassemble the plug from cable and tighten wires to the pins,
reassemble the plug making sure the cable gland is tight and
sealing cable.
e. Examine the plug gasket for any cracking/damage and
replace if necessary.
f. Carry out a Megohm test from power plug ground pin to the
ground plate in the control box. The Megohm reading of this
test should be zero.
g. Carry out a Megohm test from each power plug pin to ground.
The Megohm reading for the power plug ground pin should be
zero, and infinity for the other power plug pins.
Figure 20 Power Cable Plug
13. Refit all exterior panels, examine all door seals, check for proper
alignment and water tight integrity. All door fasteners and fastening
bolts (including Mylar washers where required) should be present
and should tightly secure the doors. Replace any gaskets that are
brittle or cracked for the following:
a. Control box
b. Access panels
c. Fresh air make-up slide
Pin to ground
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