HeatStation™ CONDENSING WATER BOILER
53
34-1161 05/17
15.2 LED Error Code Listing
The following table lists the errors detected by the Platform Ignition Module (PIM) control and the associated
LED indications.
Error Mode
LED Code
Recommended Troubleshooting
Normal Operation
Off
ID Card Fault
Red LED Steady ON, Green
Power LED OFF
Check that the proper ID card is securely connected. Perform a
power and system reset.
Internal Control Failure
Steady ON
Perform a power and system reset. If fault remains, replace the
PIM.
Airflow Fault
1 flash
Check Blower operation and blocked flue switch.
False Flame Error
2 flashes
Check for proper gas valve closure. Clean burner and electrodes.
Ignition Lockout Fault
3 flashes
Check the gas supply. See Section 6 for more information.
Ignition Proving Current
Fault
4 flashes
Check HSI element. Replace with a new element of the proper
rating.
Low Voltage Fault
5 flashes
Check the 24 VAC input voltage. The voltage must be above 18.0
VAC.
Vent Temperature Fault
6 flashes
Check for a blocked flue. Check the vent sensor and connections.
Hi-Limit Fault
7 flashes
Check for proper water flow. Check hi-limit and outlet sensors.
Sensor Fault
8 flashes
See the digital control display for fault identification. Check
sensors and wiring.
Safety #1 Fault
9 flashes
Check gas pressure. Verify proper safety switch operation.
Water Pressure Fault
10 flashes
Check piping for leaks. Check pressure switch and connections.
Blower Speed Fault
11 flashes
Verify tachometer signal and connection on J5.
LWCO Fault
12 flashes
Check LWCO switch and connections. Check the water level.
Hi-Temperature Delta
Fault
13 flashes
Check pump operation. Confirm proper water flow across heat
exchanger.
Ft-bus Communications
Fault
14 flashes
Verify the digital control display is connected and operating. Check
the cable between the control display and J1.
Safety #2 Fault
15 flashes
Check gas pressure. Verify proper safety switch operation.