Quantech
156
Form QTC3-NM1
Issue date: 12/19/2023
Section 7: Unit controls
Service mode
Use the Service Mode to view all the inputs and enable
or disable all the outputs on the unit, except the com-
pressors. Some of the internal timers and counters are
viewable and modifiable in the Service Mode. To enter
the Service Mode, turn off the unit switch and press
Service Mode times out after 30 minutes and returns to
normal control. The user can disable the Service Mode
by turning on the unit switch or by powering off and on
the 115 VAC.
The Imperial units are exact values. The
Metric units are approximates.
Table 19: Program key limits and default
Program value Low limit High limit Options Default
Data logging mode — — OFF or ON OFF
Data logging timer
(1 s Inc./Dec.)
1 s 60 s — 1 s
Fan speed control (single speed (CE) and
standard (NA) use staged fan Control)
— —
SINGLE SPEED or
STANDARD
QTC3 TWO SPEED
FANS
QTC3 VSD FANS
SINGLE SPEED
Two comp fan speed ref. 1 (VSD Fans)
(1 Inc.)
10% 99% — 10%
Three comp fan speed ref. 1 (VSD Fans)
(1 Inc.)
10% 99% — 10%
Fan ramp speed (VSD Fans)
(0.5 Inc.)
0.5 %/s 6.0 %/s — 1.0 %/s
Sys 1, 2 fan stage operation (two speed fans)
(1 Stage Inc./Dec.)
0
Number of
fan stages
— 0
Compressor soft start — —
DISABLE or
ENABLE
DISABLE
Refrigerant select — —
R-22, R-407C,
R-410A, or R-454B
R-410A
Expansion valve type — —
THERMOSTATIC or
ELECTRONIC
ELECTRONIC
Remote temp reset option — —
DISABLE or
ENABLE
DISABLE
Remote inputs service time
(1 min Inc./Dec.)
5 min 60 min — 15 min
Feature set
(R-410A/R-454B)
— —
NORTH AMERICAN
or EUROPEAN
NORTH AMERICAN
Evaporator pump control — —
(R-410A/R-454B
Chiller or Heatpump)
EXTERNAL,
KIT PUMPS 1 or
KIT PUMPS 2
EXTERNAL
Evaporator pump total run hours (R-410A/
R-454B chiller or heatpump)
(1 Inc./Dec. per entry position)
0 99999 — 0
Control Mode — —
R-410A/R-454B
LEAVING or
RETURN
LEAVING
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