TK 61552-2-MM-EN
31
H
Hiig
gh
h P
Prre
essssu
urre
e C
Cu
utto
ou
utt S
Sw
wiittcch
h:: The high pressure cutout switch is located on the compressor
discharge manifold. If the compressor discharge pressure becomes excessive, the switch opens
the circuit to the run relay to stop the unit. The microprocessor will record Alarm Code 10.
H
Hiig
gh
h P
Prre
essssu
urre
e R
Re
elliie
eff V
Va
allv
ve
e:: This valve is designed to relieve excessive pressure in the
refrigeration system. It is located on the receiver tank. The valve is a spring-loaded piston that
lifts off its seat when refrigerant pressure exceeds 500 psig (34.47 bar). The valve will reseat
when the pressure drops to 400 psig (27.58 bar). The valve could possibly leak refrigerant after it
has relieved excess pressure. Tapping the valve lightly may help the valve reseat and seal
properly. The valve is non-repairable and requires no adjustment. If the valve fails to reseat
properly, recover the refrigerant charge and replace the valve.
L
Lo
ow
w O
Oiill L
Le
ev
ve
ell S
Sw
wiittcch
h:: The low oil level switch closes if the oil drops below an acceptable level.
If it stays closed for a specified time, the microprocessor shuts the unit down and records Alarm
Code 66.
L
Lo
ow
w O
Oiill P
Prre
essssu
urre
e S
Sw
wiittcch
h:: The low oil pressure switch closes if the oil pressure drops below an
acceptable level. If it stays closed for a specified time, the microprocessor shuts the unit down
and records Alarm Code 19.
P
Prre
eh
he
ea
att B
Bu
uzzzze
err:: The preheat buzzer sounds when the controller energizes the preheat relay. This
warns anyone near the unit that the controller is about to start the engine.
Serial Number Locations
U
Un
niitt:: Nameplate on the frame inside the front doors.
E
En
ng
giin
ne
e:: Engine identification plate is located on the engine valve cover.
C
Co
om
mp
prre
esssso
orr:: Stamped between the cylinders on the front end above the oil pump.
Figure 5. Compressor Serial Number Location
1.
Serial Number Location