H B X E C O - 0 5 5 0 G e o t h e r m a l C o n t r o l
V e r s i o n 2 . 0 0
© HBX Control Systems Inc. 2018
Page 23
ISSUE
POSSIBLE CAUSES & RESOLUTIONS
Heat Pumps shut off all at the
same time
•
Check Off staging setting page. 7
Heat pumps not rotating
•
Check rotation settings page.7
System pump always running
•
Control is wired for permanent heating (pins 1-2) or cooling (pins
3-4) demand. See page 14
Control won’t go into heating or
cooling
•
Check if there is a demand on pin 1-2 and pins 3-4.
•
Check WWSD and CWSD settings
Heat pumps shutting off on high/
low pressure
•
Check hot tank or cold tank setpoints. Make sure they do not
exceed recommend heat pump limits.
Heat pumps cycling to frequently
•
Check tank differiental on page.8 & 10
•
Check heat pump lag time
Backup boilers not coming on
•
Check wiring
•
Check backup settings on page 12. Ensure one backup setting is
not set to off.
Backup boiler taking too long to
come on
•
Check backup settings on page 12
No heat or Cool call
•
Check demand inputs on pins (1-2) or pins (3-4)
•
Make sure control is not in WWSD/CWSD
Control not coming out of CWSD/
WWSD
•
Check the CWSD/WWSD time on page 11
Abnormal tank target
•
Check outdoor reset settings on page 9 & 11
Cold tank not showing on control
display
•
Check cold tank sensor is connected on pins (8-10)
•
Check wiring on page 14
Outdoor Sensor displays dashes
on control display
•
Check outdoor sensor is connected on pins (9-10)
•
Check wiring on page 14
ECO-0550 TROUBLESHOOTING GUIDE