ALLIANCE ALLWH3.2kW, Technical Manual

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AA –HP410-2011-02 Alliance Cycle-Heating Domestic Heat Pump Water Heater Technical Manual
38
7. Error Code Explanation and Analysis
Code Code Explanation Cause Analysis Solution
E2
Communication
failure
Communication failure between the main unit
and the wired controller Connect the main unit with the A, B, P, Q
and E lines of the wired controller correctly.
Electromagnetic interference because
communication line is not the shielded line Replace the communication line with the
shielded line.
Damage of the sensor Replace the sensor
E4
Water temp.sensor
failure in the water
tank
The T5 port between the sensor and the
motherboard is loose
Insert the port correctly
Sensor damage Replace the sensor.
E5
Condenser Temp.
sensor failure
The T3 port between the sensor and the
motherboard is loose
Insert the port correctly
Sensor damage Replace the sensor.
E6
Outdoor ambient
temp. sensor
failure
The T4 port between the sensor and the
motherboard is loose
Insert the port correctly
Sensor damage Replace the sensor.
E7
Sensor failure at
water pump outlet
The T6 port between the sensor and the
motherboard is loose
Insert the port correctly.
Sensor damage Replace the sensor.
Ed
Sensor failure at
the double-pipe
refrigerant outlet
The T2 port between the sensor and the
motherboard is loose
Insert the port correctly.
Sensor damage Replace the sensor.
Leakage of refrigerant
Check the leaking place, mend by welding,
exhaust the air and add refrigerant again.
P1
System high
pressure
protection
The circulating pipe between the water tank
and the main unit is too small
Use the DN 20 pipe
The circulating pipe between the water tank
and the main unit is too long The length of the connecting pipe should
be
≤ 5 m
The height difference between the water tank
and the main unit is too large
The height difference should be ≤ 3 m
There is air in the water pump Exhaust the air (see Chapter Three)
The water pump is not started
Check whether the water pump is
damaged
The capillary is blocked off (small possibility)
Weld the capillary and add refrigerant. Blow it
clear by high pressure air or replace it.
No water in the water tank and the tap water
supply is stopped Shut down the unit and start when the tap
water supply is normal
P2
System current
protection
The circulating pipe between the water tank
and the main unit is too small
Use the DN 20 pipe
The height difference between the water tank
and the main unit is too large
The height difference should be ≤ 3 m
There is air in the water pump Exhaust the air
The water pump is not started
Check whether the water pump is
damaged
The capillary is blocked off (small possibility)
Weld the capillary and add refrigerant.
Blow it clear by high pressure air or replace
it.
P8
Protection for the
over-high
temperature at the
outlet of the
condenser
(T2
≥ 60 ℃ )
Water pump is not started
Cut off the power supply, remove the bolt
on the back of the water pump and turn the
water pump axis
There is air in the water pump Exhaust the air
The water pump is not started Check whether the water pump is damaged
Pb
Anti-freezing
protection Prevent PTE cracking by freezing in the
winter
Normal protection, no need for treatment.