Gree HLR35SM/NaA-M Service Manual page 36

MODULAR MINI CHILLER
temperature
temperature
sensor
protection
Water flow
mainboard
switch
protection
communication
mainboard
error
The successive detecting time: if it is detected that the
abnormality lasts for 5s, it is error; if it is detected that the
normality lasts for 3s, it is normal.
When the inflow water temperature sensor is wrong,
all the compressor of this module will stop immediately.
When the suction temperature sensor 1 2
the corresponding
compressors stop, the fan will stop 30s later. As the outflow
water temperature sensor is not related to the logic control,
when there is error, the compressor will not stop, but the
malfunction is displayed on the display board.
When the anti-freezing temperature sensor and
ambient temperature sensor is wrong, the compressor of
sensor
this module will stop immediately and the fan will stop 30s
later.
If the defrosting sensor 1 (2) is wrong, the
corresponding compressor will stop during heating mode
and cooling mode.
If there is signal of temperature sensor malfunction
and it resume to normal automatically, the error mark will
be removed automatically. But if it occurs 3 times in one
hour or it can not resume to normal automatically, it is
necessary to remove it manually. The error LED of the
display board lights and the corresponding alarm symbol
will be shown in "malfunction view".
When a module detects that the water flow switch is
closed (in normal state, when the water pump is running,
the water flow switch is open) for 10s, the compressor of
this module will stop and the fan will stop 30s later. The
four-way valve remains the original state. The expansion
contact
valve keeps the initial steps.
When water flow switch protection occurs for all the
modules, the water pump will stop after the compressor
stops for 10s.
When the information of the display board is not
received for 30s, this module will stop automatically. For
the module with communication error, its water pump will
stop 5 min after the compressor stops.
compressor will stop.
MAINTENANCE
is wrong,
If both
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