– 128 –
7. HYDRO UNIT INSTALLATION MANUAL
Engineering Data Book
7
H02
Compressor lock
O
u
1. Defect of compressor (lock)
– Replace the compressor.
2. Defect of compressor wiring (open phase).
H03
Defect in the current detection
circuit
O
u
1. Replace the outdoor inverter control board.
H04
Operation of case thermostat
O
u
1. Check the refrigeration cycle (gas leak).
2. Check the case thermostat and connector.
3. Check that the service valve is fully open.
4. Defect of the pulse motor valve.
5. Check for kinked piping.
L10
Unset service PC board jumper
Jumpers have not been cut.
O
u
1. Cut outdoor PC board jumper wire (for service).
L29
The communication between the
outdoor PC board MUCs error
O
u
1. Replace the outdoor control board.
P03
The outlet temperature error
O
u
1. Check the refrigeration cycle (gas leak).
2. Defect of the pulse motor valve.
3. Check the resistance value of the discharge
temperature sensor (TD).
P04
The high pressure switch error
O
u
P05
The power supply voltage error
O
u
1. Check the power supply voltage.
P07
Overheating of heat-sink error
O
u
1. Check the thread fastening and heat-sink grease
between the outdoor control board and the heat-sink.
2. Check the heat-sink fan duct.
3. Check the resistance value of the heat-sink
temperature sensor (TH).
P15
Detection of gas leak
O
u
1. Check the refrigeration cycle (gas leak).
2. Check that the service valve is fully open.
3. Defect of the pulse motor valve.
4. Check for kinked piping.
5. Check the resistance value of the discharge
temperature sensor (TD) and the suction temperature
sensor (TS).
P19
The 4-way valve inversion error
O
u
1. Check the operation of the 4-way valve unit or the coil
characteristics.
2. Defect of the pulse motor valve.
3. Check the resistance value of the heat exchange
temperature sensor (TE) and the suction temperature
sensor (TS).
P20
High pressure protection operation
O
u
1. Check that the service valve is fully open.
2. Defect of the pulse motor valve.
3. Check the outdoor fan system (including clogging).
4. Over-filling of refrigerant.
5. Check the resistance value of the heat exchange
temperature sensor (TL) and the water outlet
temperature sensor (TWO).
P22
Outdoor fan system error
O
u
1. Check the lock status of the motor fan.
2. Check the connection of the fan motor cable
connector.
3. Check the power supply voltage.
Check
code
Diagnostic functional operation
Determination and action
Operational cause
Backup
present
Automatic
reset
Summary of Contents for ESTIA HWS-1501CSHM3-E
Page 3: ...2 1 INTRODUCTION ...
Page 7: ...6 2 SYSTEM OVERVIEW ...
Page 11: ...10 3 SYSTEM SPECIFICATION ...
Page 60: ...59 5 OUTDOOR UNIT ...
Page 79: ...78 6 HOT WATER CYLINDER ...
Page 85: ...84 7 HYDRO UNIT INSTALLATION MANUAL ...
Page 132: ... 131 7 HYDRO UNIT INSTALLATION MANUAL Engineering Data Book MEMO ...
Page 133: ...132 8 OUTDOOR UNIT INSTALLATION MANUAL ...
Page 162: ... 161 8 OUTDOOR UNIT INSTALLATION MANUAL Engineering Data book MEMO ...
Page 163: ...162 9 OWNER S MANUAL ...
Page 179: ...Air to Water Heat Pump Engineering Data Book Oct 2010 ...