Maintenance
Warnings and Cautions
WARNING: Always disconnect AC power before working inside the monitor.
CAUTION: When working inside the monitor, be very careful not to dislodge any electrical wiring or pneumatic tubing. The HGMSZ contains sensitive electronic components that can be easily damaged. Be careful not to touch or disturb any of these components.
Charcoal Filter
The charcoal filter (Page 8) removes refrigerant gas from the
Hydrophobic Filter
The hydrophobic filter (Page 8) prevents water from entering the IR detector. A zone flow fault will occur (fault code <0800>) if this filter should become blocked. Replace the hydrophobic filter as required (P/N
Servicing Air Lines
The gas sample line and optional exhaust line should be checked periodically for obvious signs of kinks, damage, and contamination. Replace the tubing as required (P/N
The gas sample line termination filter should be checked periodically and replaced when there are obvious signs of contamination. To service the filter simply remove it from the line and replace it with a new one (P/N
Fuses
The HGMSZ is protected from electrical damage by two, 1 A, 250 V, type “F” fuses (Page 8). Carefully remove the fuses from their fuse clips and visually inspect each fuse for damage. Replace the fuses as required (P/N
Clock Battery
The clock battery (Page 8) maintains the correct date and time when AC power is not applied to the monitor. Replace this battery about every 2 years (P/N
Sample Pump
The sample pump (Page 8) draws the gas sample into the monitor, through the IR detector, and discharges the sample out the monitor’s exhaust port. When replacing the pump, remove its inlet and outlet tubing, disconnect the AC power wires from the pump itself, and remove pump from monitor. Install a new sample pump (P/N
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