Nordic IMPULSE User Manual

NORDIC HOT TUBS | OWNER’S MANUAL |
17
DIAGNOSTIC MESSAGES
MESSAGE MEANING ACTION REQUIRED
1 Pump 2 Pump
No message on display.
Power has been cut off to the spa.
The control panel will be displayed until power returns. Spa settings will be
preserved until next power up.
Temperature unknown. After the pump has been running for two minutes, the current water
temperature will be displayed
“Overheat – The spa has shut down”
One of the sensors has detected 118ºF /
47.8ºC at the heater.
DO NOT ENTER THE WATER. Remove the spa cover and allow water to cool. Once
the heater was cooled, reset by pushing any button. If spa does not reset, shut
off the power to the spa and call your dealer or service organization.
“Overheat – The spa has shut down”
One of the sensors has detected that the spa
water is 110ºF / 43.5ºC.
DO NOT ENTER THE WATER. Remove the spa cover and allow water to cool to
107ºF / 41.7ºC. the spa should reset. If spa does not reset, shut off the power to
the spa and call your dealer or service organization.
Spa is shut down.* The sensor that is plugged
into the sensor “A” jack is not working
If the problem persists, contact your dealer or service organization.(May appear
temporarily in an overheat condition.)
Spa is shut down.* The sensor that is plugged
into the sensor “B” jack is not working
If the problem persists, contact your dealer or service organization.(May appear
temporarily in an overheat condition.)
Sensors are out of balance. If alternating with
spa temperature, it may just be a temporary
condition. If ashing by itself, spa is shut
down.*
If the problem persists, contact your dealer or service organization.
A signicant difference between temperature
sensors has been detected. This could indicate
a ow problem.
If the water level is normal, make sure all pumps have been primed. If the
problem persists, contact your dealer or service organization.
Persistent low ow problems. )Displays on the
fth occurrence of message within 24 hours.)
heater is shut down, but other spa functions
continue to run normally.
Follow action required for message. Heating capability of the spa will not reset
automatically, you may press any button to reset.
Possible inadequate water, poor ow, or air
bubbles detected in the heater. Spa is shut
down for 15 minutes.
If water level is normal, make sure all pumps have been primed. Press any
button to reset. This message will reset within 15 minutes. If problem persists
contact your dealer or service organization.
Inadequate water detected in heater. (displays
on third occurrence of message.) Spa is shut
down.
Follow action required for message. Spa will not reset automatically reset. Press
any button to reset manually.
“Ice” – Potential freeze condition detected. No action required. All equipment will automatically activate regardless of spa
status. The equipment stays on 4 minutes after the sensors detect that the spa
temperature has risen to 45ºF / 7.2ºC or higher. An optional freeze sensor may
be added to protect against extraordinary freeze conditions. Auxiliary freeze
sensor protection is advisable in colder climates. See your dealer for details.

Nordic IMPULSE Specifications

General

Dimensions	93" x 93" x 39"
Voltage	240V
Amperage	50A
Shell Material	Acrylic
Filtration	Multi-stage Filtration

Summary

Safety: Drowning and Hyperthermia Risks

Risk of Drowning

Safety warning about drowning hazards, emphasizing child supervision and suction guard compliance.

Risk of Hyperthermia

Warning about hyperthermia risks from prolonged immersion in hot water, especially for pregnant women.

Safety: Electric Shock Hazards

Preventing Electrocution

Precautions against electrocution, including avoiding auxiliary components and keeping water away from electrical parts.

Electrical Equipment Safety

Basic safety precautions for electrical equipment, grounding, and bonding requirements.

Power Installation: Wiring Locations

Wiring Entry Diagrams

Power Installation: Electrical Wiring

240 Volt Service Requirements

Requirements for 240V service, including dedicated circuits, copper wire, and GFCI protection.

Converting to 240 Volt

Steps to convert Classic/Modern series hot tubs from 120V to 240V wiring.

Power Installation: 240V Wiring Schematics

Power Installation: 120V Cord Connection

120V Cord Connection Steps

Step-by-step guide for installing a 120V cord connection, including safety warnings.

Quick Start Guide

Initial Setup Procedures

Hot Tub Operation: Single Pump System

Single Pump System Guide

Guide to operating the single pump system, including priming, temperature, jets, and light.

Operating Modes Explained

Filter Cycle Programming

Hot Tub Operation: Two Pump System

Two Pump System Start-Up

Guide to initial start-up for two-pump systems, including priming and jet operation.

Two Pump System Controls

Two Pump System Filters & Polling

Troubleshooting: Diagnostic Messages

Understanding Error Codes

Table detailing diagnostic messages, their meanings, and recommended actions.

Serviceability Warning

Critical safety warning against attempting to service the control system.

Hot Tub Operation: Jets & Controls

Whirlpool Jet Diverters

Troubleshooting Common Issues

Issue Resolution Guide

Table of common hot tub symptoms and their corresponding solutions.

Troubleshooting Serviceability Warning

Critical safety warning against attempting to service the control system during troubleshooting.

Water Treatment & Chemistry

Water Quality & Ozonator

Sanitation & Chemical Safety

Guidelines for sanitizing water, recommended chemicals, and warnings against improper use.

Adding Chemicals Guide

Hot Water Chemistry Explained

Total Alkalinity (TA) Guide

pH Measurement & Adjustment

Calcium Hardness (CH) Guide

Sanitizer Levels & Shocking

Winterizing Your Hot Tub

Winterization Steps

Step-by-step guide and materials needed for safely winterizing the hot tub.

Hot Tub Re-Start Guide