5292157-UIM-B-0317
14
Johnson Controls Unitary Products
Status and Fault Codes
The control includes an LED that displays status and fault codes. These
codes are shown in Table 3. The control will display the fault codes until
power is removed from the control or the fault condition is no longer
present.
HUM OUT Output
The HUM OUT output can be used to drive an external relay or solenoid
(24 VAC coil) to control a humidifier. The Hx
TM
communicating thermo-
stat is also a humidistat and controls this output.
Heat Output
The control is connected to the heater relays using pins 4, 5, and 6 of
connector P1. The relay outputs are 24 VAC.
The control energizes the heat relays as shown in Table 4.
Depending on the heat kit installed in the air handler, the control pro-
vides the flexibility to configure the amount of heat delivered with the
first stage heating call.
TABLE 3:
Fault Codes
Fault or Status Condition
LED1 (RED)
Flash Code
Status
No power to control
OFF
Internal control fault
ON
2 sec on 2 sec off heartbeat
Normal
0.1 sec on, 0.1 sec off
Test mode
Call for heat and cool at the same time
7
Model Plug Not inserted
8
Internal fault self-corrected, attempting normal operation
9
TABLE 4:
Heat Relays
Input
Heat Relay Output
W1
HT1
W2
HT2
W1 and W2
HT1 and HT2
