User Instructions
Symptom Probable Cause Correction
Pump Overload Indicator 1. Pump motor overload. 1. Determine problem and press
illuminated. pump reset button.
Over Temperature Indicator 1. System above temperature limit 1. Allow unit to cool below 260°F
illuminated of 260°F. (190°F on CMX-180
models) and press .
Unit runs but fails to pump 1. Incoming phase reversed on 1. Swap any two legs on the
water. pump motor. incoming power.
Unit will not heat to setpoint. 1. Cooling valve stuck open. 1. Check for cooling water fl ow
during heat cycle.
2. Heater element failure. 2. Check current at heater
contactor during heating.
3. Heater output insuffi cient. 3. Excessive losses in process or
incorrectly sized unit for
application.
4. Controller needs to be tuned. 4. Check factory MENU settings,
page 35 of this manual.
Refer to 2104 Controller
Technical Manual, page 35,
for further information.
Unit will not cool to setpoint. 1. Inadequate cooling water fl ow. 1. Open cooling water supply
line more and assure
adequate pressure.
2. Cooling outlet obstructed. 2. Check cooling outlet for
obstructions.
3. Heater contactor fused closed. 3. Check voltage across
contactor during cooling cycle.
4. Controller needs to be tuned. 4. Check factory MENU settings,
page 35 of this manual.
Refer to 2104 Controller
Technical manual, page 35,
for further information.
If you continue to have problems with the system after review of the above issues, please contact
Chromalox Product Service at 866-736-6686 from 9 A.M. to 5 P.M. EST.
Troubleshooting Guide—For qualifi ed personnel only
32
RESET
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