Maritime Geothermal EMWT-65-HACW-P-1T, Инструкция по установке и обслуживанию

Страница: 31 / 44

01 MAR 2012 Page 31 000662MAN-03
ZONE TROUBLE SHOOTING
Fault Possible Cause Verification Recommended Action
No hot water to
individual
heating zone
Faulty zone thermostat,
wiring or zone valve
head(s) No 24VAC signal present across T
and C of the heat pump terminal
strip. Locate the problem and correct it.
Faulty zone valve(s) Other zones work, 24VAC is present
across T and C of the heat pump
terminal strip but no hot water reach-
es the zone. Clean or replace zone valve(s)
No hot water to
any heating
zones Shut off valve closed. Verify that all valves in the zone
loops are open, including isolation
valves at the zone circulator inside
the unit. Open any valves that are closed.
Faulty hot zone circulator
contactor. 24VAC is present across T and C of
the heat pump terminal strip but the
contactor does not energize. Or,
contactor is energized but 115VAC
is not present across the wire on the
load terminal and ground. Replace contactor.
Faulty hot zone circulator. 115VAC is present across the wire
on the load terminal of the hot zone
circulator and ground but circulator
pump is not working.
Close isolation valves and re-
move circulator pump head. Veri-
fy operation of the impeller.
Clean or replace if faulty.
No cold water to
individual
cooling zone Faulty zone thermostat,
wiring or zone valve
head(s) No 24VAC signal present across V
and C of the heat pump terminal
strip. Locate the problem and correct it.
Faulty zone valve(s) Other zones work, 24VAC is present
across V and C of the heat pump
terminal strip but no hot water reach-
es the zone. Clean or replace zone valve(s)
No cold water to
any cooling
zones
Shut off valve closed. Verify that all valves in the zone
loops are open, including isolation
valves at the zone circulator inside
the unit. Open any valves that are closed.
Faulty cold zone circulator
contactor. 24VAC is present across V and C of
the heat pump terminal strip but the
contactor does not energize. Or,
contactor is energized but 115VAC
is not present across the wire on the
load terminal and ground. Replace contactor.
Faulty cold zone circula-
tor. 115VAC is present across the wire
on the load terminal of the cold zone
circulator and ground but circulator
pump is not working. Close isolation valves and re-
move circulator pump head. Veri-
fy operation of the impeller.
Clean or replace if faulty.