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ESI Outdoor Unit Installation Instruction
05.2018
Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
Ambient temperature limit operation
or
Display
1.Error definition and method to check:
H1: The detected ambient temperature is absolutely prohibited for cooling.
TA<14F or ≥140F
H2: The detected ambient temperature is absolutely prohibited for heating.
TA ≥ 86F or TA< forced heating stop temperature set by n01
2.Possible causes:
The ambient temperature exceeds the set range of operation.
The system is running previous mode
Damaged ambient temperature sensor (TA)
Damaged main control board.
YES
NO
Check whether the ambient temperature sensor (TA) is seated to
the specified location and connected to CN2 of PCB.
Reconnect the sensor
Check whether the resistance of sensor is in the range of
Temperature sensor A*
.
YES
NO
Replace the fault sensor
Check whether there are other heat sources around sensor
NO
YES
Remove all the other heat source
Is the outside temperature within the range of operation
Replace the main control board
NO
It’s normal control to protect the
system.
YES
YES
Does the unit running heating mode (compressor=ON) but the
thermostat switches to cooling mode, or the unit running cooling
mode (compressor=ON) but the thermostat switches to heating
mode at that time.
The unit will respond to mode
switch after stop for 6 minutes.
NO
