ELECTRICAL Battery Battery Discharge Interrupt Performance (P4) This adjustment allows the battery discharge interrupt to accurately compensate for the actual battery being used. The factory preset value represents a typical battery for a particular compartment size and is satisfactory in most cases. However, if the indicator is showing 100% discharge, or the interrupt is locking out the lift function, at too high (greater than 1175 specific gravity) or too low (less than 1140 specific gravity), the P4 setting is not suited to the actual battery being used. Chart 2 - Charge Level Comparison With P4.1 and P4.2 at Factory Settings Battery Charge % 36 V Battery 48 V Battery 100 > 37.60 V > 50.20 V 90 <= 37.60 V <= 50.20 V 80 <= 37.48 V <= 50.00 V 70 <= 37.20 V <= 49.60 V 60 <= 36.93 V <= 49.20 V 50 <= 36.80 V <= 49.00 V 40 <= 36.68 V <= 48.80 V 30 <= 36.63 V <= 48.70 V The controller performs the following to determine battery state of charge: 20 (Yellow Bar Flashing) <= 36.13 V <= 48.00 V 1. Voltage sampling is done with the truck in standby (traction motors not running) and occurs every 250ms. 10 (Lift Lock-Out) <= 35.90 V <= 47.70 V If several different batteries are used in the truck and the range in battery capacity is greater than 200 AH, the battery with the highest ampere hour rating should be used for the adjustment procedure. The factory setting for P4.1 is 0 and P4.2 is 2. 2. Samplings are averaged together and retained in memory. 3. These samplings are compared with a software table determined by the combination of P4 settings and C2 values, then the level of charge is determined (see chart 2 for 48 and 36 volt batteries at factory settings) and displayed. 4. If, after 15 minutes, the truck has not been in a standby state long enough to obtain thirty averages, the controller will decrease the discharge percentage by 5% regardless of actual state of charge. 5. Battery discharge level can reach 100% at key-on only when the battery voltage determined by the P4.1 setting is achieved and the percentage of change from the last time the battery was unplugged from the truck is greater than 15% (i.e. unplugged at 80% truck must reach a minimum charge of 96% to update the display; unplugged at 86% even if the battery achieves the corresponding P4.1 setting voltage it will not display 100%). Crown 2008 PF17252-9 Rev. 11/08 M4.6-2045-009 01 Rev. 11/08 227