Raypak VERSA IC, Installation & Operating Instructions Manual

Page: 63 / 80

63
Troubleshooting
Before troubleshooting the system, ensure that:
• Ensure units are properly installed per the
instructions provided in the installation and oper-
ation manual for the unit being serviced.
• All mechanical and electrical connections are
secure and tight
• All system wiring is correct
• A system ground is properly connected to the
heater (The igniter, flame sensor and ignition
module must share a common ground with the
burner. Nuisance shutdowns are often caused
by a poor or erratic ground.)
• Isolate the system from any other hardware
application, reset the PIM™ and restore defaults
on the VERSA
®
board. To perform this function
refer to page 67.
• The system is powered and the unit is enabled
(TH).
The PIM™ is equipped with an onboard buss-type
fuse (T8AL250VP) to protect the 24VAC circuits and
the 24VAC relay outputs to the gas valves. ONLY use
a type GMA fuse (8 Amp max) as a replacement for
proper operation.
Fault codes are displayed on the VERSA IC
®
Display.
Many of these fault codes are also displayed by a
flashing red LED on the PIM™ module. The number
of flashes indicates the fault – see Table O below for
explanation of the flash codes and troubleshooting
recommendations.
If the VERSA IC
®
Display is showing an error/fault
code, troubleshoot as noted in Tables AC.
Table O: LED Flash Codes on PIM™
Error Mode LED Flash Code on PIM™ Recommended Troubleshooting
Normal Operation Red LED 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 Fault Red LED Steady ON Perform a power and system reset. If the fault remains, replace the PIM™.
Airflow Fault Red LED – 1 Flash Check blower operation and air flow switch.
False Flame Error Red LED – 2 Flashes Check for proper gas valve closure. Clean burner and electrodes.
Ignition Lockout Fault Red LED – 3 Flashes
Check the gas supply. Check transformer. Check igniters. Check wiring.
Press reset button on PIM™/membrane switch. Recycle power.
Ignition Proving Current Fault Red LED – 4 Flashes
Check HSI element (for those models equipped with a hot surface igniter).
Replace as necessary.
Low Voltage Fault Red LED – 5 Flashes
Check the 24VAC input voltage – the voltage must be above 18.0VAC for
proper operation. Replace transformer as necessary.
Vent Temperature Fault Red LED – 6 Flashes
(If equipped with Vent sensor)Check for a blocked flue. Check the vent sen-
sor and wiring. Check vent connections and vent system. If damage is
observed, contact a qualified installer to have the vent system properly
inspected and repaired as necessary.
Hi-Limit Fault Red LED – 7 Flashes Check for proper water flow. Check hi-limit setting and outlet sensor.
Sensor Fault Red LED – 8 Flashes
Check the VERSA IC ® Control for fault identification. Check sensor and
wiring.
N/A Red LED – 9 Flashes Check wiring at J8, pins 1 & 3 for loose or missing jumper.
Water Pressure Fault Red LED – 10 Flashes
Check system piping for leaks. Check water pressure switch (if equipped)
and connections. Check wiring on PIM™ at J1, pins 6 & 7 for loose or miss-
ing jumper.
Blower Speed Fault Red LED – 11 Flashes
Verify the tachometer signal and the connections at terminals J5 on the
PIM™. Confirm power to boiler is at or above minimum required.
N/A Red LED – 12 Flashes Check wiring on PIM™ at J1, pins 3 and 4 for loose or missing jumper.
Hi-Temperature Delta Fault Red LED – 13 Flashes
Check pump operation. Confirm proper water flow across heat exchanger
(Delta T).
Ft_bus Communications Fault Red LED – 14 Flashes
Verify that the VERSA IC® Control is connected and operating properly.
Check the cable between the PIM™ and the VERSA IC® Control.
General limit circuit fault Red LED – 15 Flashes
Check the VERSA IC ® for fault indication and troubleshooting information.