Installation & Commissioning Guide - ESP Platinum OD Split Ducted Units
Doc. Part No. 0525-053
Ver. 5 200129
Page 28 of 36
TROUBLE SHOOTING GUIDE
Fault
Possible Causes
Remedies
The system does not
start.
Built-in safety timers have been
activated
Wait for up to 20 minutes is passed 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 controller and zone controller.
Check master wall control or zone controller
settings are correct.
Check the thermostat “setpoint” is set low
enough for cooling or high enough for heating.
The master wall controller timer
setting is incorrect.
Check the master wall controller timer settings.
See Operating Instructions section.
Air does not flow
(Indoor unit)
Zones might be switched off.
Check zones are switched on.
During heating operation, the hot start
function may have been activated.
During heating operation the indoor fan is
delayed for 46 seconds or until the indoor coil
reaches 24
o
C (whichever occurs first). This is to
prevent cold drafts. Wait 46 seconds and the air
will start flowing.
During defrost of the outdoor coil
in heating operation; the indoor fan
will not operate for several minutes.
Defrost
Start
Cancel
Finish
status will be shown in
master controller.
This is normal operation during the defrost
cycle to prevent cold air being blown into
rooms.
Cooling/Heating is not
sufficient.
The cooling/heating function may not
work effectively when the return air
filter is clogged with dust and dirt.
Clean the return air filter.
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.
