
24
Table 10 — Complete C Control Current LED
Status and Alarm Relay Operations
LEGEND
NOTES:
1. Slow flash is 1 flash every 2 seconds.
2. Fast flash is 2 flashes every 1 second.
3. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes
followed by a 10-second pause. This sequence will repeat con-
tinually until the fault is cleared.
Table 11 — Complete C Control LED Code and
Fault Descriptions
LEGEND
LED STATUS
DESCRIPTION OF
OPERATION
ALARM RELAY
On
Normal Mode
Open
Normal Mode with
PM Warning
Cycle
(closed 5 sec.,
Open 25 sec.)
Off
Control is non-functional
Open
Slow Flash
Fault Retry
Open
Over/Under
Voltage Shutdown
Open
(Closed after
15 minutes)
Fast Flash
Lockout
Closed
Flashing
Code 1
Test Mode — No fault
in memory
Cycling Code 1
Flashing
Code 2
Test Mode — HP Fault
in memory
Cycling Code 2
Flashing
Code 3
Test Mode — LP Fault
in memory
Cycling Code 3
Flashing
Code 4
Test Mode — FP1 Fault
in memory
Cycling Code 4
Flashing
Code 5
Test Mode — FP2 Fault
in memory
Cycling Code 5
Flashing
Code 6
Test Mode — CO Fault
in memory
Cycling Code 6
Flashing
Code 7
Test Mode — Over/Under
shutdown in memory
Cycling Code 7
Flashing
Code 8
Test Mode — PM
in memory
Cycling Code 8
Flashing
Code 9
Test Mode — FP1/FP2
swapped fault in memory
Cycling Code 9
CO
—
Condensate Overflow
FP
—
Freeze Protection
HP
—
High Pressure
LED —
Light-Emitting Diode
LP
—
Low Pressure
PM
—
Performance Monitor
LED
CODE
FAULT
DESCRIPTION
1
No fault in memory
There has been no fault
since the last power-down to
power-up sequence
2
High-Pressure Switch HP Open Instantly
3
Low-Pressure Switch
LP open for 30 continuous
seconds before or during a
call (bypassed for first
60 seconds)
4
Freeze Protection
Coax — FP1
FP1 below Temp limit for
30 continuous seconds
(bypassed for first 60 sec-
onds of operation)
5
Freeze Protection Air
Coil — FP2
FP2 below Temp limit for
30 continuous seconds
(bypassed for first 60 sec-
onds of operation)
6
Condensate overflow
Sense overflow (grounded)
for 30 continuous seconds
7
(Autoreset)
Over/Under Voltage
Shutdown
"R" power supply is <19VAC
or >30VAC
8
PM Warning
Performance Monitor
Warning has occurred.
9
FPI and FP2
Thermistors are
swapped
FP1 temperature is higher
than FP2 in heating/test
mode, or FP2 temperature is
higher than FP1 in cooling/
test mode.
FP
—
Freeze Protection
HP —
High Pressure
LP
—
Low Pressure
C
R
R
C
CC
CCG
BR
BRG
Test
Off On
FP1
JW3
TEST
MODE
PINS
Fig. 9 — Test Mode Pins Location