APEX™ tank is not refilling.
APEX™ tank refill timeout or tank level low alarm
The APEX™ system actively monitors the refill time of the tank to prevent overflow caused by the refill valve staying open for an excessive duration. There are two alarms associated with tank filling issues: the tank Refill Timeout alarm and the Tank Low Level alarm.
When a tank fill timeout alarm occurs, it indicates that the system is taking longer than necessary to fill the reservoir. This can be attributed to various factors such as a faulty fill solenoid valve, a malfunctioning tank level transducer, a fluid leak, issues with the fluid delivery system, or an incorrect Tank Fill Timeout setting in the Alarm Settings.
On the other hand, a Tank Low Level alarm is triggered when the fluid level in the reservoir falls below the designated tank low level set point. This alarm signifies that the fluid tank is nearly empty and could be indicative of problems with the fluid level transducer, the fill solenoid valve not opening, issues with the fluid delivery system, an incorrect set point, or a fluid leak.
Follow this flow chart to troubleshoot a tank that is not refilling.
Parameters 17-23 are relevant to the tank filling process. Make sure these parameters are set to their default values.
| Parameter | Description | Default | Units |
| P17 | Tank refill setpoint | 35 | % |
| P18 | Tank fill shutoff setpoint | 80 | % |
| P19 | Tank level percentage when level transducer is at the bottom of the rod. | 20 | % |
| P20 | Tank level percentage when level transducer is at the top of the rod. | 95 | % |
| P21 | Min analog value for level transducer (empty tank) | 8714 | |
| P22 | Max analog value for level transducer (full tank) | 18530 | |
| P23 | Analog setpoint for sensing a bad level transducer (cut wire) | 3000 |