ENVIROMASTER INTERNATIONAL LLC
15
HIGH CONDENSATE LEVEL TRIP.
Drain the condensate
tray and investigate. See section “Condensate high Level/”
erating pressures. Check filter condition. (See maintenance
instructions for more information).
SENSOR FAILURE (MICRO UNITS ONLY).
If any of the
sensors are faulty the microprocessor will disable the cool-
ing operation.
OUTDOOR UNIT TRIPPED.
Check outdoor unit. refer to
outdoor unit troubleshooting section.
FAULTY VALVE ACTUATOR (CHILLED WATER UNITS
ONLY).
Check cooling signal present at actuator. Check
actuator by manually opening the valve. Replace actuator if
necessary.
NO HEATING (HEAT PUMP)
POSSIBLE CAUSES/REMEDIES
INCORRECT MODE SETTING (MICRO UNITS ONLY).
Check that the transmitter MODE is set to Heat or Auto
Mode.
JUMPER LINK SETTINGS INCORRECT (MICRO UNITS
ONLY).
Check that JMP2 jumper link header on the micro-
processor is in the “ON” position. Remove power before
making changes.
SET POINT TOO LOW.
Check the set point on the trans-
mitter or wall mounted thermostat and adjust if necessary.
DEFROST MODE.
Unit is defrosting the outdoor coil. Heat-
ing will continue automatically after defrosting.
COMPRESSOR PROTECTION DELAY (MICRO UNITS
ONLY).
Check that the green On/Off Led is not flashing. If it
is flashing wait for a maximum of 10 minutes then re-check
if heating is operating.
COMPRESSOR PROTECTION DELAY (ELECTRO-ME-
CHANICAL DX UNITS ONLY).
Wait for ten minutes and
then re-check if cooling is operating
OUTDOOR UNIT TRIPPED –
Refer to outdoor unit trouble-
shooting section.
INDOOR COIL TEMPERATURE TOO HIGH (MICRO UNITS
ONLY) –
Check refrigerant charge by measuring operating
pressures. Check filter condition (See maintenance instruc-
tions for more information).
CONDENSATE PUMP BLOCKED OR FAILED.
See
sec-
tion “Water Leaking From Unit”
COIL FREEZE UP.
A coil freeze condition may have caused
excessive condensate to collect in the drip tray. See sec-
tion “Freeze Protection.”
COIL FREEZE
POSSIBLE CAUSES/REMEDIES
COOLING COIL FREEZE PROTECTION THERMOSTAT
TRIPPED (AUTO-RESET WHEN FREEZE CLEARED).
Freeze stat is normally closed, opens during freeze. Where
fitted, the stat will disable cooling action (sometimes the
entire system) during coil freeze conditions. Use the unit’s
wiring schematic to investigate.
CONDENSING UNIT RUNNING WITH CASSETTE UNIT
SWITCHED OFF (DX SYSTEMS ONLY).
System installed
such that it is possible for condensing unit to run with Cas-
sette unit switched off. Check system wiring and discon-
nect switches.
DIRTY OR BLOCKED AIR FILTER.
Clean/replace filters as
necessary. (See maintenance instructions for more informa-
tion).
SYSTEM HEAD PRESSURE SET TOO LOW.
Check con-
densing pressure, installation of low ambient kit may be re-
quired.
LOSS OF REFRIGERANT.
Check system for refrigerant
leaks and repair before recharging.
NO COOLING
POSSIBLE CAUSES/REMEDIES
INCORRECT MODE SETTING (MICRO UNITS ONLY).
Check that the transmitter MODE is set to Cooling or Auto
Mode.
SET POINT TOO HIGH.
Check the set point on the trans-
mitter or wall mounted thermostat and adjust if necessary.
COMPRESSOR PROTECTION DELAY (MICRO UNITS
ONLY).
Check that the green On/Off LED is not flashing. If it
is flashing, wait for ten minutes then recheck if cooling is
operating (Applies to chilled water units also).
COMPRESSOR PROTECTION DELAY (ELECTRO-ME-
CHANICAL DX UNITS ONLY).
Wait for ten minutes and
then recheck if cooling is operating.
DIRTY OR BLOCKED AIR FILTER.
See section “Coil
Freeze.”
TROUBLESHOOTING SECTION
