Gree HNTF24/A-D, Service Manual

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3
Condensing Unit
Service Manual
PRODUCT
3 FUNCTION
Function Description
Memory function
when unit restart after power off, it will run on former status,
the mode and parameter are kept the same
Remote control function
wireless controller and remote controller can be opted, and the
maximum control distance of remote controller is 10m.
Timing function it can timing ON/ OFF separately, meanwhile, it also can timing on circularly
Self-diagnosis with alarm function once unit has malfunction, the malfunction code will be indicated
Sleep function it can self control for saving energy in energy saving mode.
Automatic function
the fan of indoor unit can adjust fan speed automatically based on
actual demand when cooling or heating under automatic mode
Cool air proof function
the fan starts only when the temperature of indoor unit heat exchanger
is higher than indoor temperature under heating mode
Weekly Timer
Centralized Control and Week Timer Functions: The centralized controller and
the weekly timer are integrated in the same wire controller. The system has both
the centralized control and the week timing functions. Up to 16 sets of units can
be controlled simultaneously by the centralized controller (weekly timer). The
weekly timer has the function of invalidating the lower unit. The weekly timing
function is able to realized four timing ON/OFF periods for any unit every day, so
as to achieve fully automatic operation. No timing control can be set for holidays.
High/low pressure protection
when suction pressure is too low or discharge pressure is too high,
compressor will stop and unit display malfunction code
Overload protection
compressor has its own overheat protection, once the temperature
of compressor is higher than allowable level, compressor will stop
and only when temperature recovery, compressor restart
Over current protection
once the current of compressor is higher that normal level,
compressor will stop and unit display malfunction code
Discharge high
temperature protection
once the discharge temperature of compressor is higher than allowable
value, compressor will stop and unit display malfunction code
Reverse (open) phase protection
once the phase sequence of power supply is incongruent
or the phase is absent, unit can’t work
Anti-high temperature protection once the heat exchanger temperature of indoor unit is too high, compressor stop.
Timing ON/OFF display display and timing turn ON/OFF time (only with wired controller have this function)
Fan speed display
display the speed (high, medium, low) of fan(only
with wired controller have this function)
Function model display
cooling mode, dehumidifying mode, heating mode, fan mode
(only with wired controller have this function)
Testing display display testing mode(only with wired controller have this function)
Temperature display
display room temperature and set temperature (with wired
controller or remoter board have this function)