Installation and user manual
19
6. TROUBLE SHOOTING FOR COMMON FAULTS
FAILURE
REASON
SOLUTION
Heat pump doesn’t run
No power
Wait until the power recovers
Power switch is off
Switch on the power
Fuse burned
Check and change the fuse
The breaker is off
Check and turn on the breaker
Fan running but with
insufficient heating
evaporator blocked
Remove the obstacles
Air outlet blocked
Remove the obstacles
3 minutes start delay
Wait patiently
Display normal, but no
heating
Set temp. too low
Set proper heating temp.
3 minutes start delay
Wait patiently
If above solutions don’t work, please contact your installer with detailed information and your model number. Don’t
try to repair it yourself.
ATTENTION
！
Please don’t try to repair the heat pump by yourself to avoid any risk.
7. FAILURE CODE
NO.
DISPLAY
NOT FAILURE DESCRIPTION
1
E3
No water protection
2
E5
Power supply excesses operation range
3
E6
Excessive temp difference between inlet and outlet water(Insufficient water flow protection)
4
Eb
Ambient temperature too high or too low protection
5
Ed
Anti-freezing reminder
NO.
DISPLAY
FAILURE DESCRIPTION
1
E1
High pressure protection
2
E2
Low pressure protection
3
E4
3 phase sequence protection (three phase only)
4
E7
Water outlet temp too high or too low protection
5
E8
High exhaust temp protection
6
EA
Evaporator overheat protection (only at cooling mode)
7
EC
System communication failure
8
P0
Controller communication failure
Important:
Unscrew the water union of inlet pipe
to let the water flow out.
When the water in machine freezes in
winter season, the titanium heat
exchanger may be damaged.
