25
Installation and Maintenance
Service Manual
reversion abnormity protection for four-way valve 3 min; and if it
still can’t run when the reversion abnormity protection for four-
way valve happens to stop working for 3 times in succession, it is
available if presses ON/OFF.
Attention: the protection shall be shielded during the testing mode
and defrosting process, and it shall be cleared out the failure and
its times immediately when turning off or delivering wind / cooling /
dehumidifying mode conversed (the inverted mode don’t clear out
the failure when it can’t recover to operate).
(16) PFC Protection
1. After start up the PFC, it should detect the protection signal of
PFC immediately; under the condition of PFC protection, it should
turn off the PFC and compressor at one time;
2. It shows the failure is cleared out if PFC Protection stopped
working 3 min and recovers to run automatically;
3. If it still can’t run when it occurs PFC protection for 3 times in
succession, it is available if presses ON/OFF; and clear the PFC
Protection times when start up PFC for 10min.
(17) Failure Detection for Sensor
1. Outdoor Ambient Sensor: detect the failure of sensor at all
times.
2. Outdoor Tube Sensor: You should not detect the failure of
outdoor tube sensor within 10 minutes heating
operation compressor except the defrosting, and you could detect
it at other time.
3. Outdoor Exhaust Sensor:
(a) The compressor only detect the sensor failure after it start up 3
min in normal mode;
(b) It should detect the exhaust sensor failure immediately in the
testing mode.
4. Module Temperature Sensor:
(a) Short-Circuit Detection: the compressor should be detected
immediately when the module temperature
sensor occurs short-circuits;
(b) Open-Circuit Detection: the compressor should be detected on
open-circuit when it runs 3min (it needn’t 30s
avoiding the module over-heated).
(c) Detect the sensor failure at all times in the testing mode.
5. Disposal for Sensor Protection
(1) When the short-circuit of sensor is detected within 30s, It is
regarded as the temperature of sensor over-high (or infinitely
high), and now according to the over-high sensor, the machine
should carry out the corresponding protection to stop working,
and show the corresponding temperature shutdown protection
and sensor failure at the same time (for example: the compressor
stops immediately when the outdoor tube sensor short-circuit, and
the machine shall show the overload protection and outdoor tube
sensor failure).
(2) When the open-circuit of sensor is detected within 30s, The
protection shall be stopped and it shall show the corresponding
sensor failure.
6. Electric Heating Function of Chassis
(1) When Toutdoor amb.≤0 , the electric heating of chassis will
operate;
(2) When Toutdoor amb.>2 , the electric heating of chassis will
stop operation;
(3)When 0 <Toutdoor amb.≤2 , the electric heating of chassis will
keep original status.
7. Electric Heating Function of Compressor
(1) When Toutdoor amb.≤≤-5 , compressor stops operation, while
the electric heating of compressor starts operation;
(2) When Toutdoor amb.>-2 , the electric heating of compressor
stops operation;
(3) When -5 <Toutdoor amb.≤-2 , the electric heating of
compressor will keep original status.
To Next Page
Loading...
Need help?
General
