TRUE ICE SERVICE MANUAL
TEC_TM_198 | REV. A | EN 03/26/2024 Page 67 of 96
truemfg.com
Troubleshooting & Diagnosis (cont.)
Code Display Alarms Diagnosis User Action
E25
ALARM Long Purge Water level in sump did not drain to
the proper level within 4 min
Check voltage to the drain valve coil; verify
the drain is clear; verify the drain is vented;
check if sump drain is clear
E26
ALARM Long Harvest Bin switch failed to open during
3 consecutive harvests, or during
"startup" T1 does not reach 50˚F
(10˚C) in 20 min
Check bin switch to see if contacts are stuck
closed; verify the evaporator is not frozen;
check ice pattern for full sheets (could be
charge related issue)
E27
ALARM Water Leakage Water level falls below the level used
to initiate harvest in the first 5 min
Check for excessive splashing: Water curtain,
Bin/harvest flap, Drain valve leaking
E28
ALARM Pump Motor Only check during startup. Water
level must fall below 43 mm within
60 sec
Check for voltage to the pump; verify water
inlet valve is shutting off
E29
H₂O Sump tank does not fill within 3 min Check the following:
• Water filter
• Incoming water pressure
• Inlet water valve
• Drain valve
E30
ALARM Biozone Failure to the UV system Check the UV information in the menu to
verify failure
• Low current
• High current
• Lamp time exceeded
E31
ALARM Hot Gas Valve During harvest the high-side
pressure exceeded 165 psi after the
first 5 sec
Check the "No Harvest/Frozen In" flow chart
(pg. 68)
E32
ALARM Low Suction Pressure Low side pressure fell below 10 psi
during the freeze cycle
Check cycle times and pressures. Check the
ice pattern on evaporator coil. Possibly check
for leaks and restrictions.
E33
ALARM HP2 Input Secondary high side transducer
failure
Check the wire connection between the
transducer and the control board. Replace the
transducer.
E34
ALARM LP2 Input Secondary low side transducer
failure
Check the wire connection between the
transducer and the control board. Replace the
transducer.
H₂O Slow Fill Sump tank did not reach the APF
setting within the first 3 min
Check incoming water supply filter; verify the
inlet valve is energizing and is opening.
–––
Time for evaporator cleaning Prescheduled reminder to check
evaporator coil (every 24 weeks)
Check to see if the evaporator coil needs to
be chemically descaled. If not, reset counter
–––
Time for air filter cleaning Prescheduled reminder to clean
condenser air filter (every 3 months)
Check or clean condenser filter as well as
condenser coil
–––
Time to replace water filter Water filter has exceeded its
capacity
Water filter capacity should be entered upon
installation. See "Water Filter Setup" (pg. 44)
–––
Ice level sensor communication
error
Ice level sensor is not
communicating with the board
Check all connections between the ice level
sensor and the control board. Possible ice
level sensor failure.
–––
COM Communication Error Display is not communicating with the control
board. Check all connections between the
display and the control board. Unit may
require a firmware update.
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