518674-YIM-C-0610
62 Johnson Controls Unitary Products
Table 30: Heat Delay
Heat
Fan O n
Delay
Heat
F an O ff
Delay
Red
LED 8
Red
LED 4
Red
LED 2
Red
LED 1
60 180 On On On On
60 90 On On On Off
60 60 On On Off On
60 30 On On Off Off
45 180 On Off On On
45 90 On Off On Off
45 60 On Off Off On
45 30 On Off Off Off
30 180 Off On On On
30 90 Off On On Off
30 60 Off On Off On
30 30 Off On Off Off
060OffOffOnOn
0 30 Off Off On Off
0 10 Off Off Off On
Non-std Non-std Off Off Off Off
Table 31: Ignition Control Flash Codes
Flashes Fault Conditions Check
STEADY ON Control Failure Control
HEARTBEAT Normal Operation
1 Not Applicable
2
Pressure Switch
Stuck Closed
Pressure Switch
3
Pressure Switch Failed
To Close
Venter Pressure Switch
Vent Blocked
4 Limit Switch Open
Main Limit
AUX Limit
5
Flame Present With Gas
Off First Stage Gas Valve
Energized With W1 Off
Second Stage Gas Valve
Energized With First
Stage
Gas Valve Off
Gas Valve
6 Ignition Lockout
Gas Flow
Gas Pressure
Gas Valve
Flame Sensor
STEADY OFF
No Power Or Control
Failure
24VAC or Control
Table 32: VAV Control Board Flash Codes
Flash Codes Description
On Steady This is a Control Failure
1 Flash Not Applicable
2 Flashes Loss of Communications with UCB
3 Flashes Space Sensor Failed
4 Flashes SAT Sensor Failed
5 Flashes RAT Sensor Failed
6 Flashes OAT Sensor Failed
7 Flashes OAH Sensor Failed
8 Flashes RAH Sensor Failed
9 Flashes IAQ Sensor Failed
10 Flashes OAQ Sensor Failed
11 Flashes APS Switch Failed
12 Flashes Limit 2 Switch Open
13 Flashes Purge
14 Flashes VFD Input Failure
15 Flashes Dirty Filter Switch
16 Flashes Econ Minimum Position Alarm
17 Flashes Space Temp/Time Alarm
18 Flashes Water Coil Freeze Stat Alarm
19 Flashes SAT Alarm for Cooling
20 Flashes SAT Alarm for Heating
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