Trane Technologies Thermo King Advancer A360 - Unit Protection Devices

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TK 61753-2-MM-EN
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EEnnggiinnee OOiill DDiippssttiicckk:: Use the engine oil dipstick to check the engine oil level.
RReecceeiivveerr TTaannkk SSiigghhtt GGllaassss:: Use this sight glass to check the level of refrigerant in the receiver tank. See the
Refrigeration Maintenance section for the correct procedure.
Figure 3. Engine Compartment Components
1. Compressor Sight Glass 3. Engine Oil Filter
2. Engine Oil Dipstick
Unit Protection Devices
PPrreehheeaatt BBuuzzzzeerr:: 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.
CCoooollaanntt LLeevveell SSwwiittcchh:: The coolant level switch closes if the coolant level drops below an acceptable level. If it stays
closed for a specified time, the A-Series Controller records an alarm code.
EEnnggiinnee CCoooollaanntt TTeemmppeerraattuurree SSeennssoorr:: 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 A-Series
Controller records an alarm code. The controller might also shut the unit down.
HHiigghh PPrreessssuurree CCuuttoouutt SSwwiittcchh:: 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 an alarm code.
HHiigghh PPrreessssuurree RReelliieeff VVaallvvee:: This valve is designed to relieve excessive pressure in the refrigeration system. It is
located on the receiver tank. If the high pressure relief valve opens, much of the refrigerant will be lost. Take the unit to
a Thermo King dealer if this occurs.
LLooww OOiill LLeevveell SSwwiittcchh:: 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 an alarm code.
LLooww OOiill PPrreessssuurree SSwwiittcchh:: 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 an alarm code.
OOvveerrllooaadd RReellaayy -- AAuuttoommaattiicc RReesseett:: An overload relay protects the CMG - Combination Motor Generator. The overload
relay opens the circuit to the electric motor if the motor overloads for any reason (e.g., low line voltage or improper
power supply) while the unit is on electric standby operation. the A-Series Controller records an alarm code.
SSmmaarrtt FFEETTss:: Smart FETs in the microprocessor protect some circuits and components from an overcurrent condition.
Fuses are located in harnesses and in the Power Distribution Module (PDM). See below Harness fuses.
Table 1. 12 Volt Fuses in Harness
Fuse Size Function
60A Air Heater
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