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TROUBLESHOOTING
6
The following is an outline of routine troubleshooting techniques. For conditions
not covered in this section consult Trebor or a factory authorized representative.
6.1
IRREGULAR TEMPERATURE CONTROL
SYMPTOM
Poor Temperature Control
Heater Does Not Heat
6.2
HEATER ELEMENT CHECK
Lockout and Tagout power to the heater. Disconnect the heater power electrical
connections and measure the resistance between power wires or to the neutral
wire. Resistance should be less than the values listed in Table 6-1.
Heater Power
3-kW, 1Ø, 208V
4-kW, 1Ø, 208V
4-kW, 1Ø, 400V
6-kW, 1Ø
3-kW, 3Ø
4-kW, 3Ø
6-kW, 3Ø
PAGE 18
CAUSES
Low liquid flow
Location of outlet
temperature sensor
Incorrect control settings
Failed heater
Wiring short
Interlock alarm
Control system error
Power Wire to
Power Wire
<18Ω
<15Ω
<50Ω
<28Ω
<106Ω
<82Ω
<52Ω
Table 6-1: Element Resistance Check
INLINE CHEMICAL HEATER OPERATION / MAINTENANCE MANUAL
SOLUTIONS
Increase flow.
Relocate outlet
temperature sensor
closer to heater outlet.
Adjust control settings or
scheme.
Check heater element per
Section 6.2.
Check heater wiring.
Address system alarms.
Evaluate controller.
Power Wire to
Neutral Wire
N/A
N/A
N/A
N/A
<53Ω
<41Ω
N/A
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