SPX Hankinson HHE Series Instruction Manual page 39

8.9.1.20 Alarm Mode Screen 17 – Alarm
ALARM
LEFT TOWER
DRYING
OUTLET DEW POINT
8.9.1.21 Alarm Mode Screen 18 – Alarm
ALARM
RIGHT TOWER
DRYING
OUTLET DEW POINT
8.9.2 Service messages
There are two service levels (normal and severe) as described
in Program Mode. Each service level has preset time intervals
for servicing the filters, desiccant, and valves. Time continues to
accumulate as long as power is supplied to the controller, whether
the controller is switched on or off.
When a service time interval expires, the controller operates as
follows.
• The service LED blinks and the appropriate service message is
shown on the text display. (See 8.9.1)
• When the service interval for filters has expired the three filter
LEDs also blink.
NOTE: If the dryer has 1 or 2 filter monitors, the timer for filter
service is disabled. When the filter monitor(s) sends an alarm
signal (change filter) to the Level 2 Controller, the controller
displays the same LEDs and messages it would if the timer for
filter service had expired.
• The dryer continues to cycle normally.
NOTE: The LEDs for the valves, pressure switches, and desiccant
towers are not used for service indication (as in the Level 1
Controller).
To extinguish the service LED and clear the service message from the
text display, go to Program Mode and reset the appropriate service
timer. If a filter monitor is installed, reset the monitor to clear the
Service LED.
The following text display is shown for each service message.
Replacement or repair of the affected item may or may not be
necessary. The service reminders are used to schedule routine
evaluation of the operational status of key components.
8.9.2.1 Service Mode Screen 1 – Service filters
SERVICE DRYER
FILTERS
Check filter Delta-P gauges and ensure that drains are functioning
properly. Inspect pilot air filter element. Check filter monitors, if
equipped.
8.9.2.2 Service Mode Screen 2 – Service desiccant
SERVICE DRYER
DESICCANT
Check moisture indicator or outlet dew point and inspect mufflers
for excessive dusting.
8.9.2.3 Service Mode Screen 3 – Service valves
SERVICE DRYER
VALVES
Ensure that valves are cycling properly. Check for switching failure
alarms and adjust purge pressure. Check for leaks.
8.10 Display Mode
• Display Mode is active when the user exits Program Mode or
Setup Mode (unless MANUAL cycle was selected in Setup Mode)
and no alarms are active.
• The LEDs for the valves, pressure switches, and desiccant towers
operate in the same manner as in the Level 1 Controller, except
in the case of an alarm or service reminder (see 5.b and 7.b in
Alarm & Service Mode).
• Display Mode is comprised of several screens (described
below). The controller automatically scrolls through the screens,
displaying each one for 4 seconds. The user can override the
4 second time period and force the next screen to be displayed
by pressing
• The screens are displayed in the following sequence: 1, 2, 3A,
1, 2, 3B, 1, 2, 3C, 1, 2, 3D, ... with the exceptions noted below.
8.10.1 Display Mode Screen 1 – Dew point class and cycle
type.
2: -40°C/-40°F
DEMAND CYCLE
8.10.2 Display Mode Screen 2 – Energy savings.
This screen is not displayed if FIXED cycle is selected.
ENERGY SAVINGS
XX%
8.10.3 Display Mode Screen 3A – Service reminder (filters).
This screen is not displayed if 1 or 2 filter monitors are detected.
HOURS TO SERVICE
FILTERS: XXXX
8.10.4 Display Mode Screen 3B – Service reminder (desiccant).
HOURS TO SERVICE
DESICCANT: XXXX
8.10.5 Display Mode Screen 3C – Service reminder (valves).
HOURS TO SERVICE
VALVES: XXXX
8.10.6 Display Mode Screen 3D – Valve cycle counter.
CYCLE COUNTER
XXXXXXX
8.11 Test Mode
• Test Mode is active when the user exits Setup Mode after selecting
operation in MANUAL CYCLE.
• Test Mode is comprised of eight screens. Each screen
corresponds to one of eight program steps (described in Table
8-2).
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