Operating Instructions 6-2
UNIT CONTROLS
Unit Control Panel
UNIT ON/OFF Switch. This switch energises the electrical system of the unit including TG-IV, TG-V and TG-VI controllers.
This switch must be OFF before changing a TG-VI controller or software chip ; or before the battery is connected or disconnected.
• ON position. The unit will operate in response to the controller and the compartment air temperature.
NOTE: With the On/Off switch (or Zone 1 On/Off switch) in ON position, the following units may start at any time without
prior warning:
• Units equipped with MT µP-IV, µP-V, µP-VI, SR-2 or SR-3 controllers
• Units equipped with TG-VI controllers and equipped with CYCLE-SENTRY.
• OFF position. The electric control system is de-energised and the unit will not operate.
• SLEEP position (optional with MT µP-IV, µP-V and µP-VI). The unit starts and stops as required to keep the engine warm
and the battery charged.
NOTE: The unit will NOT control temperature in the trailer during Sleep mode operation.
TC, TCI and SPECTRUM MODEL NOTE: A separate ON/OFF switch is provided to energise and de-energise each remote
evaporator.
Unit Switch Panel – All Models with Multi-Temp MT
µP-IV Controller
1. Zone 1 (Unit) On/Off Switch
2. Diesel/Electric Switch (Model 50 Only)
3. Zone 2 On/Off Switch
4. Zone 3 On/Off Switch (Option)
Unit Switch Panel – All Models with µP-V or µP-VI
Controller
1. Unit On/Off Switch
2. Diesel/Electric Switch (Model 50 Only)
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