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STANDBY M ODE -- The Y and W
termimds me not active
in Standby
mode,
however
the O and G terminals
may be
active, depending
on the application.
The compressor
will be
off.
COOLING
MODE
-- The Y and O terminals
are active in
cooling mode. After power up, the fil_t c_dl to the compressor
will initiate a 5 to 80 second random st_u_tdelay and a 5-minute
anti-short
cycle protection
time delay. After both delays m'e
complete, the compressor is energized.
NOTE:
On all subsequent
compressor
calls the random
stm_t
delay is omitted.
HEATING
STAGE 1 MODE -- Terminal Y is active in heat-
lug stage 1. After power up, the first call to the compressor
will
initiate a 5 to 80 second random
start delay and a 5-minute
anti-short
cycle protection
time delay. After both delays m'e
complete, the compressor is energized.
NOTE:
On all subsequent
compressor
calls the random
stm_t
delay is omitted.
HEATING
STAGE 2 MODE -- To enter stage 2 mode, termi-
nal W is active (Y is already active). Also, the G temfimd must
be active or the W terminal
is disreg_uded.
The compressor
relay will remain on and EHI is immediately
turned on. EH2
will turn on after 10 minutes of continual stage 2 demand.
NOTE: EH2 will not turn on (or if on, will turn off) ifFPl
tem-
perature is greater than 45 F and FP2 is greater than 110 E
L()CKOUT
MODE -- The status LED will flash fast in lock-
out mode and the compressor
relay will be turned off immedi-
ately. Lockout mode can be "soft" reset via the Y input or can
be "h_u_d'' reset via the discomlect.
The last fault causing the
lockout is stored in memory and can be viewed by entering test
mode.
LOCKOUT
WITH EMERGENCY
HEAT -- While in Ix_ck-
out mode, if W becomes active, then Emergency
Heat mode
will occuc
EMERGENCY
HEAT MODE --In
Emergency
Heat mode,
terminal W is active while termimd Y is not. Terminal G must
be active or the W terminal is disregarded.
EHI is immediately
turned on. EH2 will turn on after 5 minutes of continual emer-
gency heat demmld.
NOTE:
The FPI and FP2 temperatures
do not effect emer-
gency heat operation.
HIGH-PRESSURE
SWITCH
(HP) --
In the event of high
refrigerant
pressures,
file high-pressure
switch will open. The
compressor
relay
is deenergized
immediately
because
the
high-pressure
switch is in series wifll the compressor
contactor
coil. The high-pressure
fault is recognized
immediately.
The
high plessure lockout code 2 on the LED will appear as 2 fast
flashes alternating with a 10-second pause.
LOW-PRESSURE
SWITCH
(LP) --
If the low-pressure
switch is open for 30 seconds prior to compressor
power up, or
is open and remains open for 30 continuous
seconds during the
"on"
cycle, it is considered
to be a low pressure
(loss of
charge)
fault. The low-pressure
switch input is bypassed
for
the first 120 seconds of compressor
run cycle. The low pres-
sure lockout code 3 on the LED will appem as 3 fast flashes
alternating
with a 10-second pause.
WATER COIL FREEZE
PROTECTION
(FPI) -- The FPI
thermistor
must be below the selected fieeze protection
limit
setting and the measured
temperature
is rising at a rate of less
than 2° F per 30 continuous
seconds during a compressor
run
cycle to be recognized
as a FPI
fault. The FPI
input
is
bypassed
for the first 120 seconds
of compressor
mn cycle.
The FPI
lockout
code 4 on the LED will appear
as 4 fast
flashes alternating with a 10-second pause.
AIR COIL FREEZE
PROTECTION
(FP2) -- The FP2 ther-
mistor must be below the selected freeze protection
limit set-
ting and the measured
temperature is rising at a rate of less
than 2 ° F per 30 continuous
seconds during a compressor
run
cycle to be recognized
as a FP2 fault. The FP2 input
is
bypassed
for the first 120 seconds
of compressor
mn cycle.
The FP2 lockout
code 5 on the LED will appear
as 5 fast
flashes _flternating with a 10-second pause.
CONDENSATE
OVERFLOW
(CO) -- Condensate
overflow
sensor must sense overflow
levels for 30 continuous
seconds
during a compressor
run cycle to be recognized
as a CO fault.
The CO lockout
code 6 on the LED will appear
as 6 fast
flashes alternating
with a 10-second pause.
OVER/UNDER
VOLTAGE
SHUTDOWN
-- An over/under
voltage shutdown
condition
exists when the control voltage is
NOT in the range of 18 vac to 31.5 vac. The control
will
automatically
be reset and normal operation
will resume if the
voltage comes back within at least 0.5 volts of the minimum
and maximum
voltage
range
(18.5 to 31 vac) for at least
0.5 seconds.
This case is not considered
a fault or lockout. If
the control is in over/under
voltage shutdown
for 15 minutes,
the alarm relay will close. The over/under
voltage
shutdown
code 7 on the LED will appear as 7 fast flashes alternating
with
a 10-second pause.
PERFORMANCE
MONITOR
(PM)
--
The
Performance
Monitor displays
a warning
when the heat pump is operating
inefficiently.
The control
will
immediately
generate
a PM
warning if any of file following conditions
exist:
•
FP2 is greater
than 125 F for more than 30 continuous
seconds in Heating
mode with compressor
energized.
•
FPI is greater
than 125 F for more than 30 continuous
seconds
in Cooling
mode with compressor
energized.
•
FP2 is less than 40 F for more than 30 continuous
sec-
onds in Cooling
mode with compressor
energized.
The status LED light will remain on as if control is in nor-
mal mode. Outputs
of the control,
excluding
the LED
and
alarm relay, will not be affected by PM warning.
A PM warn-
ing cmmot happen during a compressor
off cycle. During the
PM wamiug,
the alarm relay will cycle on and off. The cycle
rate will continuously
alternate
on for 5 seconds mad off for
25 seconds.
PM wmning
code 8 on the LED will appem
as
8 fast flashes alternating with a 10-second pause.
ANTI-SHORT
CYCLE
PROTECTION
-- The control
fea-
tures a 5-minute time delay from the last start before energizing
the compressor
again.
NOTE: The 5-minute mlti-short cycle occurs at every power up.
RANDOM
START -- The random
start control featmes five
80-second random start upon power up. The random st_u't delay
will be present in Deluxe D control after a control power up and
after returning
fi_m Night Setback
or Emergency
Shutdown
modes.
SWAPPED
FP 1/FP2 THERMISTORS
-- During Test mode,
the control monitors
to see if the FPI mad FP2 thermistors
am
wired to the appropriate
place. If the control is in Test mode,
the control will lock out, with code 9, after 30 seconds if:
•
The compressor
is on and in cooling
mode and the FPI
sensor is colder than the FP2 sensor
•
The compressor
is on and in heating
mode and the FP2
sensor is colder than the FPI sensol:
SENSORS
Thermistor
-- The thermistor
is negative
temperature
coeffi-
cient (NTC) type and the sensor has a 1% calibration tolerance.
See Fig. 8 and Table 6.
Condensate
Sensor -- The condensate
sensor input will fault
upon sensing impedance
less thin1 100,000 ohms for 30 contin-
uous seconds.
The recommended
design uses a single wire
terlninated
with a male
I/4 in. quick comlect
located
in the
drain pan at file desired
trip level. Upon a high condensate
level the water will short between
the air coil and the quick
connect producing
a resistance
less than 100,000 ohms. Since
condensate
is fiee of impurities,
it has no conductivity.
Only
12
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