Vaughn MP55F - Troubleshooting Guide; Error Code Reference Table; Common Operational Issues and Solutions

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TROUBLESHOOTING
FOR QUALIFIED SERVICE PERSONNEL ONLY
ERROR CODES
When the Vaughn Electronic Temperature Controller
detects an abnormal condition, the display will alternate between
the home screen, ERR, and then the error code below.
ERROR CODE
POSSIBLE CAUSE
POSSIBLE SERVICE REQ’D
ETC-H2O
1. Temperature Sensor Issue
*Check wire connections *Replace
or repair probes
(Top or Bottom sensor)
2. Controller Sensing Issue
F-01 (Top sensor)
1. Temperature Sensor Issue
F-02 (Bottom sensor)
2. Controller Sensing Issue
F-03 (Top Element)
1. Top Element Malfunction
*Check wire connections
*replace or repair probes
2. Controller Output Issue
*Replace top element
*Replace or repair control
F-04 (Bottom Element)
1. Bottom element malfunction
*Check wire connections
2. Controller output issue
*Replace top element
*Replace or repair control
F-05 (Both Elements)
1. High limit tripped
*Check high limit
2. Controller output issue
*Replace or repair control
NATURE OF TROUBLE
POSSIBLE CAUSE
POSSIBLE SERVICE REQ’D
No Hot Water
1. Water Heater Switch turned off.
Turn ON
2. Improper Wiring
*Check wiring diagram
3. No Power—blown fuse
a. Circuit over load
*Check wiring diagram
b. Improper wiring
*Provide adequate circuit
4. Manual reset limit open
a. Controller malfunction
Adjust setting or replace*
b. Heat-up due to loose wires
*Tighten connections
Not enough Hot Water
1. Heater undersized
*Install proper size heater
2. Element malfunction
*Replace element
3. Controller malfunction
*Restore default settings
Water too hot or too cool
1. Control setting too high or low
Change setting as required
2. Control out of calibration
Adjust setting or replace*
3. Insulation around elements
*Replace insulation properly
not properly replaced
CAUTION: For your safety, DO NOT attempt repair of
electrical wiring, thermostat(s), heating elements or other
operating controls. Refer repairs to qualified service
personnel.