Effective: October 2018
6 of 12
F-35-2000
LED ERROR CODE LISTING
The following table lists the errors detected by the 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 airflow 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.
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 Host Controller 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 Host Controller is connected and operating. Check the cable between the
Host Controller and J1.
Safety #2 Fault
15 flashes
Check gas pressure. Verify proper safety switch operation.
MOUNTING AND WIRING
The PIM enclosure is designed to facilitate mounting within a
control box by the appliance OEM.
The PIM is not position sensitive and can be mounted vertically
or horizontally. The case may be mounted on any surface using
four standard #8 sheet metal screws.
HIGH VOLTAGE AND REMOTE SENSE CABLE
REQUIREMENTS
The HV Ignition Cable must meet a voltage rating of 25 KV and
an insulation rating of 200 °C. Recommend length of 3ft (.9m)
or less. Consult factory for longer lengths.
Remote flame sense cable must meet a voltage rating of 250V
and an insulation rating of 200 °C. Recommended length of 10ft
(3m) or less. Consult Factory for longer lengths.
INDICATORS
The PIM has three LED indicators to display operational status
and to help diagnose system error conditions.
•
Power
: Green LED indicating the PIM module is
receiving 24 VAC power.
•
Alarm/Test
: Amber LED which indicates the PIM is in
Commission Test Mode or that a diagnostic alarm
(fault) is present.
•
Diagnostic Code
: Red LED that is normally off.
During a control or system fault condition, this LED
flashes the error codes. Refer to the following table for
additional details.
WARNING
The
PIM
must be mounted and located in a
manner which protects components from expo-
sure to water (dripping, condensate, spraying,
rain). Any control that has been exposed to
water must be replaced.
WARNING
All wiring must be done in accordance with both
local and national electrical code. Wiring must
be at least #18 AWG rated for 105°C or higher.
WARNING
The
PIM
uses voltages of shock hazard poten-
tial. Wiring and initial operation must be done by
qualified service technician.
WARNING
Operation outside specifications could result in
failure of the Fenwal product and other equip-
ment with injury to people and property.
