Product Manual

5100 SERIES UNIT HEATER

TROUBLE SHOOTING GUIDE

SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION

Thermostat calls for 1. Open (blown) fuse 1. Replace fuses, check for cause.

heat, but heater does (see Replacement Parts List for fuse size)

not function. 2. INCORRECT WIRING

2. CHECK WIRING CONNECTIONS

3. Thermal cut-out open,

deenergizing heater 3. Check for the following:

element and control --- Correct supply volts and phase

circuit. Push reset button. --- Correct control wiring (heater control

must be thru thermostat control wiring

section only).

--- Power interruption to heater during

heater operation.

--- Restriction of air around heater 1-5

minute fan purge after thermostat off.

Fan motor runs 1. Dust accumulation or 1. Clean fan motor and casing of grease

“HOT” excessive dirt on motor and oil accumulation.

2. Dirt accumulation 2. Clean louvers and between heating

elements.

3. Motor needs lubrication. 3. See Maintenance.

Fan motor runs, 1. Element contactor not 1. Check wiring for open circuit. Replace

but no heat. operating correctly. contactor if defective

2. Element fuse blown. 2. Replace fuses, check for cause. (see

Replacement Parts List for fuse size)

MAINTENANCE

CAUTION: Make certain that the power source is disconnected before attempting to service or disassemble any

componet. If the power disconnect is out of the line of sight, lock it in the OPEN position and tag to prevent the

application of power.

ELECTRICAL

Once a year inspect the control panel wiring to make certain insulation is intact and all connections are tight. Inspect

all heater and relay contacts. If the contacts appear badly pitted or burned, replace the contactor / relay.

CLEANING

Clean the unit casing, fan and motor once a year. A dirty motor will tend to run hot and eventually will be damaged

internally. Any rust spots on the casing should be cleaned and repainted.

LUBRICATION

All units have fan motors that are permanently lubricated so that only occasional cleaning is required.