32
BRH FF
GB 01/20010
Low suction pressure
(less than 4 bars)*
Low utility water inlet temperature
Low outside water inlet temperature
Thermostatic expansion valve faulty or blocked
Blocked water filter
Blocked plate heat exchanger
Check
Low discharge pressure
(less than 16 bars)*
Low utility water inlet temperature
Check
Air in water circuit
Vent
Insufficient refrigerant content
Check
Moisture in the refrigerant circuit
(flow indicator - moisture yellow)
Empty and refill
Faulty operation of outside heat exchanger control
(pressure regulating valves)
Check
High suction pressure
(greater than 20 bars)*
High utility water inlet temperature
Thermostatic expansion valve faulty or excessively
open
Check
High discharge pressure
(greater than 32 bars)*
High outside water temperature
High utility water inlet temperature
Insufficient water flow-rate in outside heat exchanger
Check
Check pump operation
Faulty operation of outside heat exchanger control
(pressure regulating valves)
Check
Air in water circuit
Vent
Excessive refrigerant content
Check
*Values indicative only
FAULT
CAUSE
SOLUTION
