What does the FLT dr fault code mean on the VUKAR DM-Universal-V1 controller?

FLT dr is the dry run fault. The controller trips when the motor current stays below the Dry Run Ampere setting (dr) for longer than the Dry Run Trip Delay (drt), which indicates the pump is running without water. To reset: it clears automatically after the Rest Timer (rst) duration if the Cyclic Timer is enabled, or press and hold the MENU switch for 2 seconds for a manual reset, or turn the power OFF and then ON.

What do the hiu and lou voltage settings do?

hiu is the high voltage cut-off limit (settable 140-500 V) and lou is the low voltage cut-off limit (settable 130-490 V). If the supply voltage stays above hiu or below lou, the controller stops the motor to protect it. Note that the factory defaults - 500 V for hiu and 130 V for lou - are the disabling values, so voltage protection is effectively OFF as shipped until the installer sets real limits. Typical settings are 460 V and 350 V for three phase systems, and 270 V and 200 V for single phase systems.

Does the motor restart automatically after a dry run trip?

Yes, if the Cyclic Timer is enabled: the FLT dr fault clears automatically after the Rest Timer (rst) duration, which also gives a low-yield borewell time to recharge before the next pumping attempt. Without the Cyclic Timer, the fault must be cleared manually by holding the MENU switch for 2 seconds, or by turning the power OFF and ON. After a fault trip, the Auto Reset Timer (atc) sets how long the controller waits before attempting an automatic restart.

How do I set overload protection with the ol and olt parameters?

ol (Overload Ampere) is the maximum current the motor is allowed to draw - the manufacturer recommends setting it to 110% to 120% of the motor's rated full-load current. olt (Overload Trip Delay) is how long the motor may run above that current before the controller trips, typically 5 to 15 seconds depending on the motor's starting characteristics; setting olt to 0000 disables the overload trip. If the controller shows FLT oL, reset it by pressing and holding the MENU switch for 2 seconds, or by turning the power OFF and ON (the power reset works only when the olm parameter is set to No).

What does the ast (Auto Start Time) setting do after a power cut?

ast is the delay after power is restored before the motor starts automatically. It is settable from 0 to 999 seconds; the factory default is 30 seconds, and 60 to 300 seconds is the typical recommended range depending on the installation. Setting ast to 0000 disables the auto start facility.

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Water Pump Digital Auto Switch — Compare Models

Rs. 3,399.00

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Power Single Phase (upto 5 HP) Single Phase (5-200A) Three Phase (upto 100 HP)

Feature Cyclic Timer + Auto Switch Cyclic Timer + Auto Switch + Clock Timer

This Water Pump Digital Auto Switch page compares VUKAR Auto Switch models for single and three phase pumps. Use the dedicated model links below to verify the exact phase, timer functions and motor rating before ordering.

Who should use this comparison?

Use this page when you need pump automation with motor protection but have not yet chosen a single phase or three phase model, or whether a Clock Timer is required in addition to a Cyclic Timer.

Compare dedicated models

Model	Verified selection direction
DEV-K1	Single phase Digital Auto Switch with Cyclic Timer; open the model page for its exact rating.
DEV-K2	Single phase Digital Auto Switch rated 5–200A with Cyclic Timer and Auto Switch; no Clock Timer.
DEV-P1	Three phase Digital Auto Switch with Cyclic Timer.
DEV-P2	Three phase Auto Switch with Clock Timer + Cyclic Timer.

Common functions across the range

Digital display and fault indication support operating checks.
Voltage, overload and dry-run protection functions depend on correct settings for the connected motor.
Cyclic Timer supports repeated ON/OFF operation on models that include it.
Clock Timer is available only where the exact model explicitly lists it.
Three phase models include phase-specific monitoring; verify the dedicated model page.

How to choose

Confirm whether the pump supply is single phase or three phase.
Match the exact model to the pump nameplate current and HP.
Choose Cyclic Timer for repeating cycles and Clock Timer for time-of-day schedules.
Have a qualified electrician complete wiring, earthing and protection settings.

Warranty, delivery and support

Warranty: 1 year when purchased from this website.
Dispatch: 0–1 working day. Expected delivery: 1–5 working days from the order date across India.
Shipping: free across India.
For model confirmation and technical support, WhatsApp or call +91 63588 96254.

Frequently asked questions

Does every Auto Switch include a Clock Timer?

No. Clock Timer is included only where the dedicated model and variant explicitly state it.

Can I choose only by HP?

No. Confirm phase, operating current, required timer functions and installation conditions as well as HP.

Watch digital auto switch connection examples

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Water Pump Digital Auto Switch — Compare Models