nextec™ — Predicts. Protects. Performs.
Servicing the Bypass Valve (Re-assembly)
1. Using needle nose pliers, place the
bypass valve retainer on top of the
bypass valve spring. Carefully align
the slot in the top of the bypass valve
retainer with the locking tab on top of
the bypass valve (Figure 5).
2. Push the bypass valve retainer down
over the locking tab on the bypass
valve. Push the retainer down
(compressing the spring) until it is
completely below the locking tab
(Figure 6) .
3. Rotate the bypass valve retainer
90 degrees clockwise and allow the
spring to gently push it back up to
contact the locking tab. The locking
tab MUST be seated in the indentation
in the bypass valve retainer (Figure 7).
Figure 4
Figure 5
Figure 6
Servicing Rotor, Vanes, and Shaft Seals
The rotor, vanes, and shaft seals are inside the
pump housing, and are accessed through the
rotor cover located on the face of the pump.
It is held in place with three 4MM hex drive
attaching bolts. You can access the rotor and
vanes for inspection and cleaning, but
DO NOT
attempt to remove the shaft seals without a new
seal kit to install.
Always inspect the rotor cover seal and mating
surface (groove) for nicks or damage prior to
reassembly. Torque the attaching hardware to
44 in lbs.
WARNING!
Always wear eye protection anytime you look into the Pump Outlet; a miss-positioned or improperly installed valve
spring retainer can pop up unexpectedly. Note that use of a small flashlight will help you better see and more easily align the
components in this task.
WARNING!
It is critical that the locking tab be seated in the indentation in the bypass valve retainer as illustrated. Failure to
do so can cause the Retainer to come off when operating in bypass mode, potentially damaging the pump, or ejecting upward
through the pump outlet while servicing.
11
This Troubleshooting guide provides basic diagnostic assistance. If you have further questions, contact us at 1-800-634-2695 (M-F 8 AM–5
PM ET), or on the web at “www.fillrite.com”.
Troubleshooting
Tones
Condition
Cure
↑
↓
↓
Low battery voltage (auto shut-off)
Charge or replace battery*
↑
↓
↑
High battery voltage (auto-shut off)
Connect to 12 to 24 VDC power source*
↓
↑
↑
Locked rotor (auto shut-off)
Turn switch off and inspect rotor and vanes*
↓
↑
↓
Priming / Suction / Lift failure
Check for leaks in suction tube, inlet connections, inside tank plumbing
restrictions, excessive vertical suction lift, empty tank
Intelligent Tones
Your nextec pump features a self-diagnostic system that will aid you in troubleshooting should the need arise. The pump will give off a series
of high and low tones; simply count the high and low tones to determine which conditions exist.
Depending on the condition the pump senses, it will generate either a
3-tone code
, or a
4-tone code
:
•
3-Tone codes
indicate an application fault; something dealing with the installation of the pump, like a priming or supply voltage concern.
•
4-Tone codes
indicate a pump fault; a condition outside the operating parameters of the pump, like an over- temperature condition, or
something dealing with the pumps internal electronics.
Refer to the table below to determine which condition your pump is detecing, and how to resolve it. In the chart below, arrows pointing up
(
↑
) indicate high tones, arrows pointing down (
↓
) indicate low tones; their order tells which fault is detected. Conditions listed in BOLD are
notifield servicable, and require the pump to be returned to the manufacturer.
3-Tone Faults
(Application / Installation faults)
4-Tone Faults
(Hardware faults)
Tones
Condition
Cure
↓
↑
↑
↑
Hardware fault (auto shut-off)
Troubleshoot as described below**
↓
↑
↓
↓
Hardware overtemperature (auto-shut off)
Turn switch off and allow pump to cool*
↓
↓
↑
↑
Motor overtemperature (auto shut-off)
Turn switch off and allow pump to cool*
↓
↓
↑
↓
Motor overvoltage (auto shut-off)
Troubleshoot as described below**
↓
↓
↓
↑
Motor undervoltage(auto shut-off)
Troubleshoot as described below**
*This condition will shut the motor off. To restart the motor, cycle the switch off, then back on.
** Prior to returning pump to place of purchase, perform this procedure:
cycle the switch off and disconnect power for at least one minute. Reconnect power, and cycle the switch back
on. Verify proper pump operation. If this procedure does not restart the pump, or if you have additional questions, contact Customer Service at 1-800-634-2695.
DANGER!
Disconnect all power prior to performing any service or maintenance. Failure to disconnect the power may cause
electrical shock, or unexpected starting of the motor, resulting in injury or death.
DANGER! DO NOT
open or attempt to repair the motor on your Tuthill pump. Return it to the place of purchase for service.
Opening the motor case will compromise the integrity of the Explosion Proof construction and void any existing warranty,
approvals, and certifications (i.e.: ATEX, UL listing, CE, etc.).
