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SECTION 3 - TROUBLESHOOTING 

3.1 Symptom / Resolution Chart 

SYMPTOM 

TO RULE OUT 

RESOLUTION 

Circuit Overload 

Measure the amperage in the low-voltage side of the 
transformer to determine if exceeding transformer power 
rating. Remove loads if necessary. See chart in section 
entitled ”Specifications” for model’s output current in 
amps. 

Defective Wiring 

Check wiring to load. Improperly insulated wiring or 
moisture in the wiring can cause the thermal safety to 
cycle. 

Taps Connected 
Together 

Determine if the unused taps are connected together on 
multi-tap units. If they are wired together, the transformer 
will make a loud buzzing noise and turn off very quickly. 
If left unattended, the lead wires can melt. Insulate any 
unused wiretaps individually with wire nuts. 

Lights cycle off / on every 10 to 20 
minutes 

Insufficient 
Ventilation of 
Transformer 

If the transformer has improper ventilation, the 
transformer will become hot and the thermal safety 
overload will trip.  

Transformer is buzzing 

Taps Connected 
Together 

Determine if the unused taps are connected together on 
multi-tap units. If they are wired together, the transformer 
will make a loud buzzing noise and turn off very quickly. 
If left unattended, the lead wires can melt. Insulate any 
unused wiretaps individually with wire nuts. 

Confirm 
transformer shuts 
off in less than 10 
minute intervals 

This is not a problem with the transformer. It is an 
indication of a load issue and equipment connected to 
transformer will need to be checked.  

Failed Light 
Sensor 

There may be a problem with the load, e.g. a bad sensor 
in the light fixture. Only the manufacturer of the light 
fixture can address this problem. 

Lights cycle off / on every few 
seconds 

Failed Low Water 
Sensor 

It may be an indication that the low-water cut-off sensor 
in the light fixture is bad. Only the manufacturer of the 
light fixture can address this problem. 

The transformer is putting out 
voltage, but the lamp isn’t working 

Outside Wiring 

If the transformer is working and the lamp isn't lighting, 
the problem is not with the transformer. Check for the 
integrity of wiring to the load or the load itself. 

The transformer is working fine, but 
it is warm to the touch 

Insufficient 
Ventilation of 
Transformer 

A transformer under full load will be warm to the touch 
and the surface temperature can reach 130° F. This is 
normal. If the transformer has improper ventilation, the 
transformer will become hot and the thermal safety 
overload will trip.  

Wrong Meter 
Setting Used 

If there is full voltage going to the transformer it should 
be producing a full 12-volt output. Ensure the output 
voltage is being measured with a voltmeter set on the AC 
voltage setting - not the DC setting. 

An electrical meter shows only   
two (2) volts output from the 
transformer 

Incorrect Usage of 
Transformer 

It is a common misconception that transformers 

change

 

AC-voltage to DC-voltage. A Transformer only 

reduces

  

voltage. As an example, the Safety Volt transformer can 
reduce 120-volts AC to 12-volts AC, 13-volts AC, or 14-
volts AC.  

Figure 7 

 

Summary of Contents for ST-100-12

Page 1: ...Read This Guide Before Installing or Operating Your Equipment Installer This document is Purchaser s property and is to remain with the Equipment Owner LTP0069 Rev 2 Safety Volt Transformer Installat...

Page 2: ...or AquaCal Customer Support Local code requirements for wiring vary the local code regulations must be followed with permits and inspections obtained The installer should read and follow the associate...

Page 3: ...be attached to a stable surface that will hold the weight of the enclosure and any related wiring or components Also confirm placement will not damage any underlying equipment behind enclosure 4 Util...

Page 4: ...er 12 k x W x D VT 12 Required Voltage for load K Multiplying factor dependent on the wire gauge of the wire used W Power Consumption of the load in watts D Distance from the transformer in feet VT Tr...

Page 5: ...a load issue and equipment connected to transformer will need to be checked Failed Light Sensor There may be a problem with the load e g a bad sensor in the light fixture Only the manufacturer of the...

Page 6: ...wires Multiple lamp installations must have parallel wiring That means that all of the white wires from the lamp fixtures are connected to the appropriate tap as calculated in Figure 5 How many amps w...

Page 7: ...s applicable only if the product has been installed operated and maintained expressly and completely in accordance with this product s installation guide 8 This warranty is void if the product is repa...

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