4-1 62-10630
SECTION 4
SERVICE
W ARNING
Beware of unannounced starting of the unit. The unit may cycle the fans and operating compressor
unexpectedly as control requirements dictate. To ensure unit will not start, place the EMERGENCY
SWITCH (see Figure 1-1) in the OFF position. To ensure unit is without power, remove power plug
and
remove battery negative cable.
4.1 PREVENTATIVE MAINTENANCE
Regular servicing is required in order to optimize thelife
andreliabilityofyourunit.Therecommendedscheduled
maintenance intervals and categories are provided in
Table 4-1 while descriptions of the service procedures
to be carried out under each category are provided in
Table 4-2
Table 4-1 Preventive Maintenance schedule
Hours
Service
A
Service
B
Service
C
Service
D
100 G
GG
G
1000 G
GG
G G
GG
G
2000 G
GG
G G
GG
G G
GG
G
3000 G
GG
G G
GG
G
4000 G
GG
G G
GG
G G
GG
G G
GG
G
5000 G
GG
G G
GG
G
6000 G
GG
G G
GG
G G
GG
G
7000 G
GG
G G
GG
G
Table 4-2 Service Category Descriptions
Service A
1. Check the tension of the alternator
belt(s).
2 .Check that the vehicle engine idles
correctly with unit operating. Check
compressor mounting hardware and
belt tension. (Paragraph 4.2)
3 .Check the tightness of bolts and
screws and that the unit is correctly
fastened onto the box.
Service B 1 . Clean condenser & the evaporator .
(Paragraphs 4.3 & 4.4)
2. Replace the road compressor
belt(s).
3. Check and if required Replace the
filter-drier. (Paragraph 4.5)
4. Clean the TXV orifice filter. (Para-
graph 4.6)
5. Check standby compressor oil level.
Level should be from 1/4 to 1/2 sight
glass.
Service B
(Cont’d)
6. Check standby compressor oil level.
Level should be from 1/4 to 1/2 sight
glass.
7. Check the operation of cab com-
mand.
8. Check the defrost
DCut-in
DFan shut-down
DCut-out
DDefrost water drain
9 .Check the water tightness of the
emergency switch cap.
Service C 1 .Check the bearings of the belt ten-
sion pulley. If a spring is fitted, change
spring.
2. Change the shockmounts (if any)
installed on the road compressor
mounting kit.
3. Check the operation of the evapora-
tor and condenser fans. Change the
condenser motor brushes. The
evaporator of this unit is equipped with
brushless fan motors therefore, brush
maintenance is not required..
4. Change the compressor oil. Use
polyol ester oil (POE) approved by
CARRIER. Refer to paragraph 1.2.
Service D 1. Change the removable fuses and
capacitor (if any) in the control box.
4.2 BELT MAINTENANCE AND ADJUSTMENT
A belt tension gauge provides an accurate and easy
method of adjusting belts to their proper tension.
Properly adjusted belts give long lasting and efficient
service.Toomuchtensionshortensbeltandbearinglife,
andtoolittletensioncausesslippageandexcessivebelt
wear. It isalsoimportant tokeep belts and sheavesfree
ofanyforeignmaterialwhichmaycausethebeltstoslip.
The Belt Tension gauge can be used to adjust all belts.
The readings which we specify for Carrier Transicold
units areapplicableonlyfor our beltsandapplication,as
the tension is dependent on the size of the belt and
distance between sheaves. When using this gauge, it
should be placed as close as possible to the midpoint
between two sheaves.
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