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30
TK 61552-2-MM-EN
Engine Compartment Components
The following maintenance items can be checked visually.
W
WA
AR
RN
NIIN
NG
G
R
Riisskk o
off IIn
njju
urry
y!!
T
Th
he
e u
un
niitt cca
an
n sstta
arrtt a
att a
an
ny
y ttiim
me
e w
wiitth
ho
ou
utt w
wa
arrn
niin
ng
g.. P
Prre
essss tth
he
e O
OF
FF
F kke
ey
y o
on
n tth
he
e H
HM
MII cco
on
nttrro
oll
p
pa
an
ne
ell a
an
nd
d p
plla
acce
e tth
he
e m
miiccrro
op
prro
occe
esssso
orr O
On
n//O
Offff ssw
wiittcch
h iin
n tth
he
e O
Offff p
po
ossiittiio
on
n b
be
effo
orre
e iin
nssp
pe
eccttiin
ng
g o
orr
sse
errv
viicciin
ng
g a
an
ny
y p
pa
arrtt o
off tth
he
e u
un
niitt..
C
Co
om
mp
prre
esssso
orr O
Oiill S
Siig
gh
htt G
Glla
assss:: Use this sight glass to check the compressor oil level. See the
Refrigeration Maintenance section for the correct procedure.
C
CA
AU
UT
TIIO
ON
N
S
Se
errv
viicce
e P
Prro
occe
ed
du
urre
ess!!
M
Ma
akke
e ssu
urre
e tth
he
e u
un
niitt iiss ttu
urrn
ne
ed
d o
offff b
be
effo
orre
e a
atttte
em
mp
pttiin
ng
g tto
o cch
he
ecckk tth
he
e e
en
ng
giin
ne
e o
oiill..
E
En
ng
giin
ne
e O
Oiill D
Diip
pssttiicckk:: Use the engine oil dipstick to check the engine oil level.
R
Re
ecce
eiiv
ve
err T
Ta
an
nkk S
Siig
gh
htt G
Glla
assss:: Use this sight glass to check the level of refrigerant in the receiver
tank. See the Refrigeration Maintenance section for the correct procedure.
Figure 4. Engine Compartment Components
1.
Compressor Sight Glass
3.
Engine Oil Filter
2.
Engine Oil Dipstick
Unit Protection Devices
C
Co
oo
olla
an
ntt L
Le
ev
ve
ell S
Sw
wiittcch
h:: The coolant level switch closes if the coolant level drops below an
acceptable level. If it stays closed for a specified time, the microprocessor records Alarm Code
37.
E
En
ng
giin
ne
e C
Co
oo
olla
an
ntt T
Te
em
mp
pe
erra
attu
urre
e S
Se
en
nsso
orr:: The microprocessor uses the engine coolant
temperature sensor to monitor the engine coolant temperature. If the engine coolant
temperature rises above an acceptable level, the microprocessor records Alarm Code 41 and
possibly 18. The microprocessor might also shut the unit down.
F
Fu
usse
e L
Liin
nkk ((C
Cu
urrrre
en
ntt L
Liim
miitte
err)):: The fuse link is located in the positive battery cable. The fuse link
protects the electric system from a short. If the fuse link burns out, replace it by replacing the
positive battery cable.
F
Fu
usse
ess:: Various fuses are located on the base controller to protect circuits and components. See
“Fuses” in the Electrical Maintenance Chapter for more information.
S
Sm
ma
arrtt F
FE
ET
Tss:: Smart FETs in the base controller protect circuits and components. See “Smart
FETs” in the Electrical Maintenance Chapter for more information.