Thermo King SLXi Spectrum, Maintenance Manual

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Operating Instructions 6-25
TG-VI, MT µP-IV, µP-V, µP-VI , SR-2 and SR-3 Controllers:
Perform a Full Pre-trip Test or Unit Self Check to check the trailer, unit and unit control circuits. The test must be performed with
the unit in Diesel mode and no alarms present. A Full Pre-trip Test may take up to 30 minutes. The unit will operate unattended.
Clear and correct all alarms conditions before beginning.
• If the unit is operating on electric power, turn the unit
On/Off switch to the OFF position. Then turn electric power supply OFF and disconnect power cord.
• Units with MT µP-IV or µP-V controller: A Full CYCLE-SENTRY Pretrip Test can be initiated by pressing the TK LOGO
key before the engine starts. To perform a Full CYCLE-SENTRY Pretrip Test, stop the unit by turning the unit On/Off switch
OFF. On mPVI, the Pre-trip key can be pressed to initiate Pre-trip.
• Units with TG-VI: The Unit Self Check or Full Pretrip test does not test the CYCLE-SENTRY system. Therefore, the TK
LOGO key can be pressed to initiate the test after the engine has started.
• Units with SR-2/SR-3 controller: A Pretrip Test can be initiated by Menu soft key. Then press the Back or Next soft keys until
the Pretrip screen appears.
Performing a Full Pre-trip Test or Unit Self Check:
a. MT µP-IV controllers only: Select Cycle Sentry i/o in the Cycle Sentry menu to perform a Full Pre-trip Test.
b.Place unit (or Zone 1) On/Off switch in the ON position. To test remote evaporator circuits, also place Zone 2 and Zone 3
On/Off switches in the ON position.
TCI and SPECTRUM MODEL NOTE: Only the zones with the On/Off switch ON will be tested.
c. Press and hold the TK LOGO key for at least 3 seconds (or PRETRIP key on µP-VI). PRE TRIP then appears on the MT
µP-IV, or µP-V or µP-VI display (USC appears on the TG-VI display).
MT µP-IV, µP-V and µP-VI NOTE: Press the TK LOGO key (or PRETRIP key on µP-VI) before the engine starts to perform
a Full Pretrip Test. After the ENTER key is pressed, PRE AMPS appears on the MT µP-IV display, indicating the amps check
is being performed. The amps check continues for several minutes. Then the unit starts automatically and the controller
performs the operating tests.
d.Press the ENTER key while PRE TRIP or USC is displayed. PRE LOAD appears on the MT µP-IV, µP-V or µP-VI display
(Lod appears on the TG-VI display) and the Full Pre-trip/Unit Self Check test starts.
e. When the Pre-trip/Unit Self Check test is complete, the controller displays PASS, CHECK (CHEC) or FAIL. If CHECK
(CHEC) or FAIL occurs, view alarm codes and correct all conditions. Then repeat the Full Pre-trip Test/Unit Self Check
test. The unit should PASS before being released for service.
PRE-COOLING.
Adjust the controller to the required temperature setpoint. Allow the unit to operate for one-half to one hour
(longer if possible) before loading the trailer. Pre-cooling removes residual body heat and moisture from the trailer interior and
provides a good test of the refrigeration system.
DEFROST.
When the unit has finished pre-cooling the trailer interior, manually initiate a Defrost cycle. This will remove the
frost that builds up while operating the unit to pre-cool the trailer. Defrost cycle should terminate automatically.
TG-VI, µP-V, µP-VI , SR-2 and SR-3 NOTE: A manual defrost function is built into the controller. Press SELECT key
(MODE key on µP-VI) (Manual Defrost key on SR-2/SR-3) to scroll to the dEF screen in the menu display. Then press the
ENTER key to initiate Defrost. The display will briefly show Lod (load) and enter Defrost.
Loading Procedure
1. To minimise frost accumulation on the evaporator coil and heat gain in the trailer, make sure the unit is OFF before opening
the doors. (Unit may be operating when loading the trailer from a warehouse with door seals.)
2. Spot check and record load temperature while loading. Especially note any off-temperature product.
3. Load product so that there is adequate space for air circulation completely around the load. DO NOT block the evaporator
inlet or outlet.
4. Products should be pre-cooled before loading. Transport temperature control units are designed to maintain loads at the
temperature at which they were loaded. Temperature control units are not designed to pull hot loads down to temperature.