Sinclair AST-24BI Service Manual page 41

Service Manual
Malfunction
No.
Name
Outdoor
discharge
16 temperature
sensor is open/
short-circuited
17 IPM protection
18 PFC protection
Compressor
19 loss step
protection
20 Startup failure
Capacitor
21 charge
malfunction
IPM sensor
22 circuit
malfunction
IPM high
23 temperature
protection
Over voltage
24 protection for
PN
Low PN voltage
25
protection
Charging Circuit
26
Malfunction
Installation and Maintenance
Error
A/C Status
Code
The unit will stop operation as it
reaches the temperature point.
During cooling and drying operation,
the compressor stops operation
F5
while IDU fan motor operates; During
heating operation, the heating fan
motor operates according to the
conditions of blowing residual heat.
"During cooling and drying
operation, compressor will stop
H5 while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
"During cooling and drying
operation, compressor will stop
HC while indoor fan will operate;
During heating operation, the
complete unit will stop operation"
"During cooling and drying
operation, compressor will stop
H7 while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
"During cooling and drying
operation, compressor will stop
LC while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
"During cooling and drying
operation, compressor will stop
PU while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
"During cooling and drying
operation, compressor will stop
P7 while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
"During cooling and drying
operation, compressor will stop
P8 while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
"During cooling and drying
operation, compressor will stop
PH while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
"During cooling and drying
operation, compressor will stop
PL while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
"During cooling and drying
operation, compressor will stop
PU while indoor fan will operate;
During heating operation, the
complete unit will stop operation."
Possible Causes
1. The wiring terminal between outdoor discharge
temperature sensor and maiboard is loosened or poorly
contacted;
2. There's short circuit due to trip-over of the parts on
maiboard;
3. Outdoor discharge temperature sensor is damaged
(Please check it by referring to the resistance table for
temperature sensor);
4. Mainboard is broken.
1. The compressor wiring connection is not well connected;
2. The compressor is damaged;
3. The Outdoor mainboard is damaged.
1. The unit voltage input is abnormal;
2. The inductance wire is not well connected;
3. The Outdoor mainboard is damaged.
1. The system pressure is too high;
2. The unit voltage input is too low;
3. The compressor wiring connection is not well connected;
4. The Outdoor mainboard is damaged.
1. The compressor wiring connection is not well connected;
2. There's too much refrigerant;
3. The compressor is damaged;
4. The Outdoor mainboard is damaged.
1. The unit voltage input is within abnormal range;
2. The electric reactor connection wiring is not well
connected;
3. The Outdoor mainboard is damaged.
The Outdoor mainboard is damaged.
1. The temperature of IPM module is too high;
2.The Outdoor mainboard is damaged.
1. The input voltage is too high;
2. The Outdoor mainboard is damaged.
1. The input voltage is too low;
2. The Outdoor mainboard is damaged.
1. The electric reactor connection wiring is not well
connected;
2.The Outdoor mainboard is damaged.
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