Thermo King SLXi Spectrum, Maintenance Manual

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THERMOGUARD MULTI-TEMP MT Μ P-IV AND Μ P-V CONTROLLERS
The MT µP-IV, Multi-Temp MT µP-IV and µP-V controllers are programmable microprocessors that control all unit functions
to maintain the cargo at the proper temperature. The controller continuously monitors unit operational information including:
Return air, discharge air, coil and ambient temperature sensors; unit hourmeters; oil pressure gauge; water temperature gauge;
ammeter; voltmeter; tachometer; mode indicators; and temperature control system controls.
WARNING: Make sure to turn the On/Off switch OFF before opening unit doors or inspecting or working on any part of the
unit.
• • Multi-Temp MT µP-IV or µP-V Controller: The unit may START automatically AT ANY TIME when the On/Off switch
is in the ON position.
CAUTION: The microprocessor On/Off switch (or circuit breaker CB3) MUST be in the OFF position before disconnecting
or connecting the unit battery.
NOTE: Refer to the appropriate Controller Operation and Diagnosis Manual for complete operation and diagnosis
information.
Unit operational information appears on liquid crystal display (LCD). During normal operation, the Standard Display appears on
the screen. Return air temperature (upper display) and setpoint temperature (lower display) is the factory set Standard Display
(this may be changed). Check the symbols (icons) that appear on the display. These symbols identify the operating information
that currently appears.
Multi-Temp MT µP-IV: The Standard Display for each zone automatically alternates on the screen every 10 seconds.
A keypad allows the operator to select information to display and programme unit features including the setpoint temperature. If
no key is pressed for about 10 seconds, the display will return to the Standard Display.
MT µP-IV, Multi-Temp MT µP-IV and µP-V Display Screen
1. Temperature Display (Upper Display)
2. Cool Symbol
3. Heat Symbol
4. Defrost Symbol
5. High Speed Symbol
6. Return Air Symbol
7. Discharge Air Symbol
8. Setpoint Display (Lower Display)
9. Setpoint Symbol
10. Electric Standby Symbol
11. In-range Symbol
12. Modulation Symbol
13. Alarm Symbol
14. CYCLE-SENTRY Symbol
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