Installation and Commissioning Guide - Split Ducted ESP Digital Units
Doc. No.0525-077 Ver. 2 200129
Installation and Commissioning Guide
Split Ducted ESP Digital
38
18. Troubleshooting Guide
Fault Possible Causes Remedies
The system does not start.
Built-in safety timers have been activated
Wait for up to 20 minutes to pass from turn on
time.
A breaker has turned OFF or a fuse has
blown.
Check breakers and fuses.
The thermostat set point is incorrect.
In Wall Control.
Check master wall control settings are correct.
Check the thermostat “setpoint” is set low
enough for cooling or high enough for heating.
The master Wall Control timer setting is
incorrect.
Check the master Wall Control timer settings.
See Operating Instructions section.
Air does not flow
(Indoor unit)
Built-in safety timers have been activated
Wait for up to 20 minutes to pass from turn on
time.
A breaker has turned OFF or a fuse has
blown.
Check breakers and fuses.
The thermostat set point is incorrect. In
Wall Control.
Check master wall control settings are correct.
Check the thermostat “setpoint” is set low
enough for cooling or high enough for heating.
Cooling/Heating is not
sufficient.
The master Wall Control timer setting is
incorrect.
Check the master Wall Control timer settings.
See Operating Instructions section.
The cooling/heating function may not
work effectively if the air inlet and air
outlet on the outdoor unit are blocked.
Make sure the air inlet and air outlet on the
outdoor unit is not blocked.
Check that the area around the outdoor unit is
free from obstructions that may cause the airflow
to recirculate.
The airflow across the indoor coil may
not be enough and the anti-freeze
protection or over heat prevention
systems can lower the cycle capacity for
the unit.
Reduce the total static pressure on the indoor fan
to increase airflow.
For example increase duct sizes, reduce tight
duct work bends or increase return air grille size.
The cool/heat load is too great for the air
conditioner.
Perform a heat load analysis on the conditioned
space. You may need to consider upgrading your
air conditioner with a larger system.
Open windows or doors will cause
inefficient operation.
Close windows and doors in conditioned areas.
Appropriate zones not turned on. Turn on appropriate zones (if applicable)
The outside temperature is beyond the
air conditioner design conditions.
If you know a extreme day is coming turn the
air conditioner on a few hours before ambient
temperatures reach extreme. This should help on
those few extreme days.
You may be trying to operate the whole
house on Auto Fan Mode.
Change fan mode to CONT HIGH fan speed. This
increases the total fan speed. This will boost fan
capacity.
Steam emitted from
outdoor unit.
This is caused by the defrosting
operation of the outdoor units heat
exchanger in heating operation in cold
ambient conditions.
This is normal during the defrost operation in
cold ambient conditions.
Water emitted from
outdoor unit.
Condensation of water on the outdoor
coil during heating operation.
This is normal during heating operation. You can
purchase drip trays to contain then drain this
excess water.
Set temperature cannot be
adjusted.
The master control set temperature
limits are reached.
Check the upper and lower temperature limits
are set correctly. See operation manual for
details on setting upper and lower temperature
limits.
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