ENVIROMASTER INTERNATIONAL LLC
16
NO HEATING (Electric Heat)
POSSIBLE CAUSES/REMEDIES
INCORRECT MODE SETTING (MICRO UNITS ONLY) –
Check that the transmitter Mode is set to Heat or Auto Mode.
SET POINT TOO LOW –
Check the set point on the trans-
mitter or wall mounted thermostat and adjust if necessary.
OVERHEAT CUT OUT TRIPPED
– (See section “Electric
Overheat.”)
Investigate cause of over heat condition.
• Possible low airflow, check filter condition. (See
maintenance instructions for more information).
• Possible fan failure. Check fans. (See section “Fans Will
Not Run”)
Remove power from unit and reset manual overheat cut-out
by rubbing.
DO NOT PRESS!!
Consult EMI technical support for instruction if necessary.
HEATER ELEMENT FAILED –
Investigate and replace if
necessary.
FAULTY HEATER RELAY –
Check signals to relay and
check action of relay contacts. Replace relay or PCB if nec-
essary.
NO HEATING (Hot Water)
POSSIBLE CAUSES/REMEDIES
INCORRECT MODE SETTING (MICRO UNITS ONLY) –
Check that the transmitter MODE is set to Heat or Auto
Mode.
SET POINT TOO LOW –
Check the set point on the trans-
mitter or wall mounted thermostat and adjust if necessary.
BLOCKED OR DIRTY FILTERS CAUSING LOW AIRFLOW
–
Check filter condition (See maintenance instructions for
more information).
NO HOT WATER/PUMPS FAILED –
Check hot water source
and supply to unit.
FAULTY VALVE/ACTUATOR –
Check actuator by manu-
ally opening and closing valve, replace if faulty.
FAULTY HEATER RELAY –
Check signals to relay and
check action of relay contacts. Replace relay or PCB if nec-
essary.
FANS WILL NOT RUN
POSSIBLE CAUSES/REMEDIES
LOOSE WIRE –
Check all fan wire connections. Use unit’s
electrical schematic to verify that fan is wired correctly.
FAULTY FAN CAPACITOR –
Check fan capacitors, replace
if necessary.
FAULTY FAN MOTOR –
Check fan motor protector for open
circuit, replace if necessary.
ELECTRIC OVERHEAT
The electric heat circuit contains one automatic reset and
one manual reset overheat cut-out protection switch for each
electric heat element fitted to the unit. The cut-outs are wired
in line with the mains power flowing in each element and
operate as described below.
AUTO CUT-OUT:
If the auto cut-out trips, the elec-
tric heat is temporarily disabled until the unit tem-
perature falls and causes the overheat cut-out to
automatically reset.
MANUAL CUT-OUT:
If the manual cut-out trips, the
electric heat is disabled until the unit temperature
falls and the overheat cut-out is manually reset. It
will typically take five minutes for the unit tempera-
ture to fall sufficiently to allow the cut-out to be re-
set. The cut-out should only be reset by a qualified
and competent electrician and with the main power
switched off. Ensure the elements have cooled suf-
ficiently.
TROUBLESHOOTING SECTION
!
!
WARNING
THIS EQUIPMENT CONTAINS LIVE ELECTRICAL AND
MOVING PARTS. ISOLATE ALL ELECTRICAL EQUIP-
MENT BEFORE ANY MAINTENANCE WORK IS CAR-
RIED OUT!!
