Sapphire Audio DV425TR Benutzerhandbuch

02/01                                                                                     Page 55                                                                               250-5533

Defective Magnet

(mV Plus systems).

Defective Safety Magnet

(milliVolt System)

Pilot Orifice blocked.

Wrong Pilot Orifice.

Low gas pressure to 

appliance.

Pilot not lit.

Control Knob in the "ON" 

position.

Thermostat not in the "ON" 

position.

Thermo-generator out-put 

voltage not within design 

parameters.

Defective Thermostat or 

Thermostat Wiring.

Defective Wall Switch. 

If the mV reading is above 6mV and the Safety Magnet does 

not hold, replace the Valve.

(E) If closed-Circuit mV reading is the same as the Open-

Circuit reading, the Coil is electrically "Open". Replace the 

Valve.

Verify operation of Safety Magnet in the following manner:

(A) Remove all Wires from the Terminals of the Main 

Operator.

(B) Measure the electrical voltage between the Termihals 

TPTH and TP.  If the voltage is above 110mV and the Safety 

Magnet does not hold, replace the Valve.

Replace Orifice with a new Orifice of the exact size and type.

Replace the Orifice with a new Orifice supplied specifically 

for the appliance and gas in question.

Check Gas Pressure (&" NG/11"LP)

Light Pilot and wait for Thermo-generator to heat up 

sufficiently to power the Main Operator.  If Pilot fails to light, 

hold, hold, refer to the above sections.

Rotate "OFF/PILOT/ON" Control Knob to the "ON" position.

Turn Thermostat "ON" and then adjust Temperature Control 

to call for heat.

If unable to meet minimum requirements, replace the 

Thermo-generator.

(A) With the apilot adjusted properly, place a Jumper Wire 

between TPTH and TH.  Take a mV reading across the TPTH 

and TH Terminals of the Valve.  This Closed Circuit voltage 

should not fall below 300mV. Record reading.

(B) Remove Jumper wire from the TPTH and TH conections 

and connect the Thermostat Wires to the same Terminals. 

Closed Circuit voltage as described in the previous Step.  If 

the mFV reading drops below 150mV, excessive resistance 

exists in the Thermostat Circuit and must be isolated and 

eliminated.

Repeat the above troubleshooting items covered under 

"Defective Thermostat or Thermostat Wiring" except, 

substitute the words "Wall Switch" where the word 

Thermostat appears in the instructions.