Bulletin TI-GCGS-E
Installation, Operation and Maintenance Manual
Technical Information
GC Gas Stations GC-4000, FID-4000
www.labgasgenerators.com
15
Change Water
Low Cell Pressure
Cell Over Voltage
No Hydrogen Delivered
Low Output Pressure
Symptom
Course of Action
Low Zero Air Pressure
Excess Hydrocarbons
Service Zero Air Module
Poor quality water added to fill reservoir. See maintenance section for Deionizer Resin
Cartridge replacement.
Hydrogen Overflow due to a leak detected in system or downstream. If the hydrogen pressure
drops below 10 psi, the “Cell Pressure Low” will be displayed. To clear error message, shut
down then restart generator.
Hydrogen demand exceeds generator capacity. Check capacity of equipment and piping
down stream and install a flow control device. To clear error message, shutdown then restart
generator.
Check internal system piping for leaks. To clear error message, shutdown then restart
generator.
Adjust regulator to desired output pressure.
Hydrogen demand exceeds generator capacity. Check capacity of equipment and piping down-
stream and install a flow control device.
Check external system piping for leaks.
Check internal system piping for leaks.
Check power connections (see "No Power").
Check water level. Generator will shut down if water level is below the EMPTY level.
Customer installed shutoff valve is closed; open valve.
Check piping for leaks. Consult factory.
Heater defect. Low temperature. Allow purifier to heat up OR heater problem. Consult
factory
Cell voltage is out of normal operating range.
Change water and refill. Restart unit. If error message was due to poor water quality then
message would be cleared. If message not cleared, consult factory for cell replacement.
Check inlet air pressure. Pressure drop up to 4 psid (0.3 bar) is normal. Minimum inlet air
pressure is 40 psig (2.8 barg).
Check flow demand and overflow condition. Flow demands in excess of capacity may cause high
pressure drop through generator.
Low temperature. Allow purifier to heat up OR heater problem. Consult factory.
Check generator for leaks.
The Zero Air has not reached adequate temperature . Allow a minimum startup, warm up
period of 55 minutes .
Check downstream Zero Air flow demand. If flow capacity of generator is exceeded, the ZAG
tower will be below the desired operating temperature and Hydrocarbon removal will be
affected.
An excessive pressure drop (greater than 4 psig/0.3 bar) may cause a high pressure drop
through generator.
If demand exceeds capacity, install a flow controller downstream from the zero air output.
Display message indicates the 2 year service is required for zero air module. Replace per
maintenance instructions of consult factory
