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July 19, 2026 3 min read

1. PREVENTATIVE MAINTENANCE SCHEDULE & COST-SAVING CHECKS

Interval Component Supervisor Inspection Action Why It Matters / Cost Impact
Every 30 Hours Squeegee Blades Inspect wear on front/rear squeegee blades. Rotate blades to use a new edge (all 4 edges can be used before replacing). Prevents streak marks and avoids purchasing new squeegee blades prematurely.
Weekly Solution Filter Unscrew and clean the clear inline solution filter under the chassis. Prevents dry-scrubbing damage to floor surfaces and solenoid valve burnout.
Weekly Dispensing Lines Check solution hose connections for kinks, buildup, or leaks; test manual shutoff valve. Ensures consistent detergent delivery and avoids water pooling during storage.
Monthly Battery Terminals & Charger Check terminal connections for tightness and corrosion. Verify wall outlet dedicated line. Prevents premature battery failure ($400+ replacement cost) and voltage drops.
Quarterly Brush & Suction Carbon Brushes Inspect carbon brush length on drive motors (Must be ≥ 8.0 mm). Prevents total motor failure and expensive full-assembly replacements.

2. BATTERY & CHARGER CONFIGURATION CONTROL

CRITICAL SUPERVISOR CONTROL: Incorrect charger settings will permanently damage batteries within weeks. Always double-check DIP switch positions on the internal charger board whenever replacing or swapping batteries!

┌────────────────────────────────────────────────────────────────────────┐
│                        DIP SWITCH CONFIGURATION                        │
├──────────────────────────┬───────────────────────┬─────────────────────┤
│ Battery Type             │ Switch 1              │ Switch 2            │
├──────────────────────────┼───────────────────────┼─────────────────────┤
│ Discover AGM / Gel       │ OFF                   │ ON                  │
│ Exide Gel                │ ON                    │ OFF                 │
│ Wet / Lead-Acid          │ OFF                   │ OFF                 │
└──────────────────────────┴───────────────────────┴─────────────────────┘

  • Storage Protocol: Instruct staff to plug in the charger after every shift. Lead-acid/AGM batteries left discharged for >48 hours sustain permanent capacity loss (sulfation).

  • Charge Lockout Safety: The CS16 will not operate while the charger cord is connected to AC power. If an operator reports a "dead machine," verify the power cable is completely unplugged from the wall.

3. FIRST-LINE TROUBLESHOOTING DECISION TREE

(Run these checks before opening a paid service ticket)

                       PROBLEM DETECTED BY OPERATOR
                                     │
      ┌──────────────────────────────┼──────────────────────────────┐
      ▼                              ▼                              ▼
 [ POOR SUCTION /            [ NO WATER / SOLUTION          [ MACHINE WILL NOT
   WATER LEFTOVER ]             FLOWING ]                     POWER ON ]
      │                              │                              │
      ├─► Check recovery tank        ├─► Verify solution tank       ├─► Check if charger cable
      │   gasket seal.               │   has water/detergent.       │   is still plugged into wall.
      │                              │                              │
      ├─► Clean dirty water          ├─► Ensure manual valve        ├─► Turn key off, wait 10s,
      │   float filter screen.       │   (cock) is OPEN.            │   and turn back ON.
      │                              │                              │
      ├─► Inspect suction hose       ├─► Unscrew inline solution    └─► Check main fuse / battery
      │   for clogs or tears.        │   filter & rinse debris.         voltage (>21.5V required).
      │                              │
      └─► Rotate / flip worn         └─► Test solution switch on
          squeegee blades.               handle switch pad.

4. DASHBOARD ALARM CODES & IMMEDIATE ACTIONS

Alarm Code LED Indicator Cause Immediate Supervisor Action
Brush Shutdown 2 Quick Flashes (Brush LED) Peak Current / Short Circuit Free brush pad manually. Check for wrapped string/wire around axle.
Brush Overload (I²T) 2 Slow Flashes (Brush LED) Heavy Brush Friction Verify correct pad/brush type for floor surface. Check motor amp draw.
Suction Shutdown 2 Fast Flashes (Suction LED) Suction Motor Overload / Short Check vacuum fan for clogged debris or moisture intake into fan housing.
Thermal Protection Fast Flashing (Both LEDs) Power Board / MOS-FET Temp >150°C Turn off unit and allow to cool down in ambient temperature for 15–20 mins.
Charger Active 7 Flashes (Yellow LED) AC Cable Plugged In Disconnect AC wall plug before attempting operation.
Battery Critical 6 Flashes (Red LED) Battery Voltage Below Cutoff Dock immediately for full 8-hour charge cycle.

5. OPERATIONAL SPECIFICATIONS 

  • Operating Voltage: 24V DC

  • Brush Motor Cutoff Current: ~15A (after 20 seconds overload)

  • Suction Motor Cutoff Current: ~30A (after 20 seconds overload)

  • Carbon Brush Replacement Threshold: Replace at < 8.0 mm length

  • Solenoid Valve Voltage: 21.4V – 25V DC

Looking for Replacement Parts or Technical Support?

Whether you need replacement squeegee blades, brush motors, filters, or battery care supplies, keeping OEM-spec parts on hand ensures minimal downtime. Contact our service team or explore our catalog for exact-fit replacement parts for Tennant, Nobles, and other leading floor scrubber brands. Shop Tennant CS16 Parts