WATLOW ELECTRIC MANUFACTURING COMPANY
Installation & Maintenance Manual for MULTICELL
TM
Heaters
I&M MANUAL No: 316-42-21-1
Page: 16
Date: 3/15/2017
Rev: 5.00
WATLOW ELECTRIC MANUFACTURING COMPANY - 6 INDUSTRIAL LOOP RD.
– HANNIBAL, MO 63401 - PHONE 573-221-2816
Original Instructions (English)
Troubleshooting
The information provided below contains potential causes and corrections for functional problems
with the Product(s). This is a nonexhaustive list of potential problems and corrections and is not
meant to cover all potential issues. Please do not hesitate to contact your Watlow representative
if you have any questions regarding the performance of your Product(s).
PROBLEM
Cause / Correction
No power available to heater Check disconnect switch to ensure it is in the "ON" position
And that fuses are not blown. Replace fuses if they are blown
Fuses blowing
Check heater electrical rating. Applied voltage may be wrong
Check fuse rating. Fuses should be at least 25% more than
full Load Amperage
Disconnect heater power source. Check the heater resistance
To ground. This should be no less than 50 Megohm. Refer to
Megohm checking.
Check heater enclosure for loose or oxidized connections.
repair and tighten as necessary
Check heater enclosure for presence of condensation.
Conduit seals or drains may be required
Not enough power
Check line voltage to ensure it is within specification
Check full line current if voltage is correct. If line current is
lower, the heater may be wired wrong or has open elements
Fluid not heating to desired Not enough Kw
Temperature
Too much heat loss
High limit tripping / alarm
Not enough gas flow
Too much kW
Line voltage higher than designed / allowable
WARNING
– Risk of Electric Shock
High voltage is present when the heater is energized and hence troubleshooting of
this heater shall only be done by qualified personnel. It is the U
ser’s responsibility to
ensure that proper precautions are taken in reference to applicable personal
protective equipment (PPE) needed by those installing and maintaining equipment.
