Simple Faultfinding - ESP Varimax I ASHP Installation And Operation Manual

Discharge temp.
Too high
2
)
Freeze alarm
Power fault
L
alarm
o
Outlet temp. too
o
cold
k
Compressor 2
overcold
EEV alarm
*
Suction probe
.
error
*
EEV alarm
Evap. Probe
.
error
2

12.2 Simple Faultfinding

The following is a list of some basic faults and solutions.
Failure Possible causes for the
failure
Heat pump 1 Wrong power supply
cannot 2 power supply cable loose
be started 3 circuit breaker open
Water pump is 1 lack of water in the piping
running with 2 much air in the water loop
high noise or 3 water valves closed
without water 4 dirt and block on the water filter
Heat pump 1 lack of refrigerant;
capacity is low, 2 bad insulation on water pipe;
compressor 3 low heat exchange rate on air side
do not stop exchanger;
4 lack of water flow
High 1 too much refrigerant
compressor 2 low heat exchange rate on air side
exhaust exchanger
Low pressure 1 lack of gas
problem 2 block on filter or capillary
of the system 3 lack of water flow
Compressor do 1 power supply failure
not run 2 compressor contactor broken
3 power cable loose
4 protection on compressor
5 wrong setting on return water temp.
6 lack of water flow
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V 1.7
Exhaust
temperature is too
high
Water flow rate is
inadequate
Not used in
single phase unit
Water flow rate is
inadequate
Water flow rate is
not enough
The sensor is open
or short circuit
The sensor is open
or short circuit
Solutions
1 shut off th e power and check power supply;
2 check power cable and make right connection
3 check for the cause and replace the fuse or circuit
breaker
1 check the water supply and charge water to the piping;
2 discharge the air in the water loop;
3 open the valves in water loop;
4 clean the water filter.
1 check for the gas leakag e and recharge the refrigerant;
2 make good insulation on water pipe;
3 clean the air side heat exchanger;
4 clean the water filter
1 discharge the redundant gas
2 clean the air side heat exchanger
1 check the gas leakage and recharge freon;
2 replace filter or capillary;
3 clean the water filter and discharge the air in water loop.
1 check off the power supply;
2 replace compressor contactor;
3 tighten the power cable;
4 check the compressor exhaust temp.;
5 reset the return water temp.;
6 clean the water filter and discharge the air in water loop.
Check through each
temp. switch and
return circuit
Check the water flow
volume and flow
switch operation,
Check the water flow
volume, and flow
switch operation
Check the water flow
volume and flow
switch operation
Check or change the
sensor
Check or change the
sensor
PASRW040-D-BP