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Sensor
Outputs
--
Compressor
relay is 24 vac and can
be verified using a voltmetel: The fan signal is passed through
the board to the external
fan relay. The aku'm relay can be
24 vac or chT contact
for use with DDC
(Direct
Digital
Controls)
by clipping the Jl jumpo:
Electric heat outputs are
24 vdc ground sinking and require a voltmeter
set to DC to
verify operation.
Test Mode
--
Test mode can be entered for 20 minutes by
shorting the test pins. For diagnostic
ease at the thermostat,
the
;flarm relay will ;flso cycle during Test mode. The alarm relay
will cycle on and off similm'ly to the status LED to indicate a
code representing
the last fault at the thermostat.
NOTE:
Test mode can ;flso be entered
and exited by cycling
the G input 3 times within a 60-second
time period.
Refer to Table 13
_
Yes j
for Troubleshooting.
I
F
Did Unit
No
/
/
attempt to
start?
Ves
Did Unit
Yes
I
'°ck°utat
I
,,_
2
start-up?
No
Does Unit
short cycle?
No
Does only
Fan run?
{,No
Does only
Compressor
run?
I
Did Unit lockout I Yes
after a period
of operation? /
Does Unit
operate in
cooling?
{,Yes
Unit is operational.
See Troubleshooting
Table 13 for
additional information.
Check Main Power.
Refer to Table !3
for Troubleshooting
|[
Check fault LED code _,_/
No fault
on control board.
I _ /
shown
(See Tables 4, S, 7)
€
Replace Control
Fig. 9 -- Aquazone
TM
Electric Heat Pump Control Troubleshooting
Flow Chart
17
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