TM 10-4520-262-12&P                                                    0010 00 0010 00-7 Table 1. Operator Preventive Maintenance Checks and Services Item No. Interval Location Procedure Not Fully Mission Capable If: Item to Check/ Service 5 Before In-Tent Controller Assembly CAUTION Be sure to perform ONLY a visual check of the ON/OFF switch for damage. DO NOT flip the switch to the ON position. Perform a visual check of the in-tent controller assembly (1) and verify that the ON/OFF switch (2) and LOWER/HIGHER control (3) are undamaged. Check five advisory lights and ensure that none are damaged: HEATER ON/ON HOLD (4),   BATTERY CHARGING (5),   BATTERY CHARGED (6),   SYSTEM FAULT (7), and   AT SETPOINT (8). Verify that the ON/OFF switch (2) is in OFF position, and the LOWER/HIGHER control (3) is set at LOWER.   Ensure that connector (9) and its threads are clean and undamaged, and protective cap (10) is firmly attached by the chain assembly (11). ON/OFF switch is damaged.   LOWER/HIGHER control is damaged.   Advisory lights are broken.   Connector is dented or has stripped threads. 6 Before In-Tent Controller Assembly Cable Check in-tent controller cable (12) and verify that insulation (13) and connectors (14) are clean and undamaged. In-tent controller cable insulation is cut or otherwise damaged exposing wires. Connectors are dented, bent, or otherwise damaged, preventing a secure connection to the in- tent controller or heater.